# List of cities in Iowa

Iowa is a state located in the Midwestern United States. As of 2010, there are 943 incorporated cities in the U.S. state of Iowa. According to the 2020 United States Census, Iowa has 3,190,369 inhabitants and 55,857.13 square miles (144,669.3 km$^2$) of land.
Iowa is divided into 99 counties and has 943 cities. Every incorporated place in Iowa is called a "city", regardless of population. Incorporated cities can choose one of six forms of municipal government that differ primarily on how the legislative and administrative responsibilities are separated: mayor-council, mayor-council with an appointed manager, council-manager-at-large, commission, council-manager-ward, home rule charter or special charter. Most operate as mayor–council.
According to the 2020 Census, 2,014,831 of Iowa's 3,190,369 residents lived in urban areas, accounting for 63.1% of the population. The first city to incorporate was Farmington on January 11, 1841, while the most recent was Maharishi Vedic City on July 25, 2001. The largest city by population and by land area is Des Moines with 214,133 residents and 90.65 square miles (234.8 km$^2$). The smallest city by population is Le Roy with 11 residents.

## Most populous cities

| Rank | City | Population | County | Description |
| 1 | Des Moines | 214,133 | Polk, Warren | Des Moines is a major center for the insurance industry and also has a sizable financial services and publishing business base. In fact, Des Moines was credited with the "number one spot for U.S. insurance companies" in a Business Wire article. The city is the headquarters for the Principal Financial Group, the Meredith Corporation, Ruan Transportation, EMC Insurance Companies, and Wellmark Blue Cross Blue Shield. Forbes magazine ranked Des Moines as the "Best Place for Business" in 2010. |
| 2 | Cedar Rapids | 137,710 | Linn | Cedar Rapids is a major center for agricultural processing and food production in the U.S., with the largest concentration of cereal manufacturers in the world. It is also home to a sizeable technology and aerospace industry, anchored by the presence of Rockwell Aerospace (now part of Raytheon). Cedar Rapids is home to the Cedar Rapids Museum of Art, the National Czech & Slovak Museum & Library, the Paramount Theatre, Theatre Cedar Rapids, and the Iowa Cultural Corridor Alliance. It is also home to the Cedar Rapids Kernels (Class A minor league baseball club affiliated with the Minnesota Twins), the Cedar Rapids RoughRiders (hockey), and the Cedar Rapids Titans (IFL football). |
| 3 | Davenport | 101,724 | Scott | Located approximately halfway between Chicago and Des Moines, Davenport is on the border of Iowa and Illinois within the area known as the Quad Cities. The city is prone to occasional flooding due to its location on the Mississippi River. There are two main universities: Saint Ambrose University and Palmer College of Chiropractic, which is where the first chiropractic adjustment took place. The city has a Class A minor league baseball team, the Quad Cities River Bandits and hosts the Quad City Air Show, Iowa's largest airshow. |
| 4 | Sioux City | 85,797 | Woodbury, Plymouth | Sioux City is at the navigational head of the Missouri River, about 95 miles north of the Omaha-Council Bluffs metropolitan area. Sioux City and the surrounding areas of northwestern Iowa, northeastern Nebraska and southeastern South Dakota are sometimes referred to as Siouxland, especially by the local media. The city is home to several cultural points of interest including the Sioux City Public Museum, Sioux City Art Center and Sergeant Floyd Monument, which is a National Historical Landmark. |
| 5 | Iowa City | 74,828 | Johnson | Iowa City was the second capital of the Iowa Territory and the first capital city of the State of Iowa. The Old Capitol building is a National Historic Landmark, and it is a tourist attraction in the center of the campus of the University of Iowa, as well as being an integral part of the university. The University of Iowa Art Museum and Plum Grove, the home of the first Governor of Iowa, are other landmarks. In 2008, Forbes magazine named Iowa City the second-best small metropolitan area for doing business in the United States. |
| 6 | West Des Moines | 68,723 | Polk, Warren, Dallas | The West Des Moines area used to be home to the Sac and Fox tribes. West Des Moines is the second-largest city in the Des Moines metropolitan area and the sixth-largest city in Iowa. It ranked 94th in Money magazine's list of the "100 Best Places to Live and Launch" in 2008. It is one of Iowa's largest and wealthiest cities and one of Des Moines's richest suburbs. |
| 7 | Ankeny | 67,887 | Polk | A 2015 Special Census count conducted from December 2014 through March 2015 has the population at 54,598, a population growth of nearly 20% in the past 5 years. The population was 45,562 in the 2010 census, an increase of 68% from the 27,117 population in the 2000 census. It is part of the Des Moines–West Des Moines Metropolitan Statistical Area. |
| 8 | Waterloo | 67,314 | Black Hawk | The name "Waterloo" supplanted the original name, "Prairie Rapids Crossing" shortly after Charles Mullan petitioned for a post office in the town. Since the signed petition did not include the name of the proposed post office location, Mullan was charged with selecting the name when he submitted the petition. Tradition has it that as he flipped through a list of other post offices in the United States, he came upon the current name. The city is part of the Waterloo–Cedar Falls Metropolitan Statistical Area. |
| 9 | Ames | 66,427 | Story | Ames is the home of the Iowa State University, a public research institution, and Iowa State University College of Veterinary Medicine. Ames hosts a national site for the U.S. Department of Agriculture's Animal and Plant Health and Inspection Service (APHIS) which comprises the National Veterinary Services Laboratories (NVSL) and the Center for Veterinary Biologics (CVB), and the Agricultural Research Service's National Animal Disease Center (NADC). |
| 10 | Council Bluffs | 62,799 | Pottawattamie | Council Bluffs, until 1852, was Kanesville—the historic starting point of the Mormon Trail and eventual northernmost anchor town of the other emigrant trails. It is the county seat of Pottawattamie County, and is on the east bank of the Missouri River across from what is now the much larger city of Omaha, Nebraska. |
| 11 | Dubuque | 59,667 | Dubuque | The city lies at the junction of three states: Iowa, Illinois, and Wisconsin, a region locally known as the Tri-State Area. It serves as the main commercial, industrial, educational, and cultural center for the area. Geographically, it is part of the Driftless Area, a portion of North America that escaped all three phases of the Wisconsinian Glaciation. It is one of the few large cities in Iowa with hills, and is home to a large tourist industry, driven by the city's unique architecture, and river location. Also, it is home to five institutions of higher education, making it a center for culture and learning. |
| 12 | Urbandale | 45,580 | Polk, Dallas | As of the 2000 census, the city population was 29,072; a special census taken by the city in 2005 counted 35,904 residents and the United States Census Bureau estimated that 38,369 residents lived there in 2008. It is part of the Des Moines–West Des Moines Metropolitan Statistical Area. |
| 13 | Marion | 41,535 | Linn | Marion is part of the Cedar Rapids Metropolitan Statistical Area. The town was named after Francis Marion, a hero of the Revolutionary War. The site was selected in 1839 to be the first county seat of the newly organized Linn County. After years of debate over moving the county seat to Cedar Rapids, it was put to a vote in 1919. The vote was 9,960 in favor of moving the seat and 4,823 not in favor. |
| 14 | Cedar Falls | 40,713 | Black Hawk | Cedar Falls is home to one of Iowa's three public universities, the University of Northern Iowa. Cedar Falls was first settled in March 1845 by brothers-in-law William Sturgis and Erasmus D. Adams. Initially, the city was named Sturgis Falls. The city is part of the Waterloo–Cedar Falls Metropolitan Statistical Area. |
| 15 | Bettendorf | 39,102 | Scott | Bettendorf is the fourth largest city in the Quad Cities. The first modern-day riverboat casinos in the United States were launched in Bettendorf on April 1, 1991, by local businessman Bernard Goldstein. He went on to found the Isle of Capri Casinos. Goldstein and his family members also operate Alter Companies, which is a scrap metal, barge and towboat company operating on the river waterfront. The Quad Cities Waterfront Convention Center opened by the casino and hotel in 2009. It is owned by the city and operated by the Isle of Capri. |
| 16 | Waukee | 31,823 | Dallas | Waukee is part of the Des Moines – West Des Moines Metropolitan Statistical Area. The population was 13,790 at the 2010 U.S. Census; a fast growth has been measured since as it is estimated there were 19,284 people living in Waukee in 2016. |
| 17 | Marshalltown | 27,591 | Marshall | Marshalltown is the county seat of Marshall County. |
| 18 | Mason City | 27,388 | Cerro Gordo | Mason City is the county seat of Cerro Gordo County. Mason City has a very diverse employment base covering multiple sectors of the economy including manufacturing, health, financial services, technology, and education, with no one sector or employer dominating the market. |
| 19 | Ottumwa | 25,529 | Wapello | Ottumwa is located in the southeastern part of Iowa, and the city is split into northern and southern halves by the Des Moines River. |
| 20 | Fort Dodge | 24,871 | Webster | Fort Dodge is a major commercial center for North Central and Northwest Iowa. It is located on U.S. Routes 20 and 169. |
| 21 | Clinton | 24,469 | Clinton | Clinton is the county seat of Clinton County. |
| 22 | Johnston | 24,064 | Polk | Johnston is the location of the headquarters of Pioneer Hi-Bred Seeds, Iowa Public Television, and The Gardeners of America/Men's Garden Clubs of America. Also located here are the Camp Dodge Military Reservation as well as the Paul J. and Ida Trier House, a private residence designed by famous architect Frank Lloyd Wright. |
| 23 | Burlington | 23,982 | Des Moines | Burlington is the county seat of Des Moines County. It was the first capital of the Iowa Territory and also one of the oldest towns in Iowa. Burlington is the home of Snake Alley, once labelled the crookedest alley in the world. |
| 24 | Muscatine | 23,797 | Muscatine | Muscatine is located along the Mississippi River. The name Muscatine is unique in that it is not used by any other city in the United States. |
| 25 | Coralville | 22,318 | Johnson | Coralville is a suburb of Iowa City and part of the Iowa City Metropolitan Statistical Area. Coralville incorporated as a city in 1873. The city's name comes from the fossils that are found in the limestone along the Iowa River. |
| 26 | North Liberty | 20,479 | Johnson | The North Liberty area was first settled in 1838 by John Gaylor and Alonzo C. Dennison. It was originally known as "Big Bottom" or "North Bend" (in reference to its location near the bend of the Iowa River) by its earliest settlers and was later known as "Squash Bend" before the city was platted as North Liberty in 1857. |
| 27 | Altoona | 19,565 | Polk | Altoona is home of Adventureland, an amusement park, Prairie Meadows, a horse racing track and casino, and a Bass Pro Shops retail store, the first one in central Iowa. It is a suburb of Des Moines. |
| 28 | Clive | 18,601 | Dallas, Polk | Clive is known for its Greenbelt Trail system running through the entire community. Clive serves as the axis of the western Des Moines suburbs, being located between Urbandale, Waukee and West Des Moines along the major transportation corridors of I-35, I-80 and I-235. The City of Urbandale is to the north to northwest, the City of West Des Moines is to the southeast to southwest, the City of Waukee in Dallas County is to the west. |
| 29 | Indianola | 15,833 | Warren | Indianola is the county seat of Warren County. Simpson College, a liberal arts college of the United Methodist Church, is in Indianola. It is also the home of the National Balloon Classic and National Balloon Museum. |
| 30 | Newton | 15,760 | Jasper | Newton, established in 1846 and incorporated in 1856, serves as the county seat of Jasper County. The community is located on Interstate 80, just 30 minutes east of the Des Moines metro. It is the home of Iowa Speedway, Maytag Dairy Farms, the historic Capitol II Theatre and Valle Drive-In. F.L. Maytag started the Maytag Corporation in Newton. |

## List of cities

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| † | County seat |
| †† | State capital and county seat |
| Name | Count(ies) | Population (2020) | Population (2010) | Land area | Land area | Incorporated |
| Name | Count(ies) | Population (2020) | Population (2010) | sq mi | km$^2$ | Incorporated |
| Ackley | Hardin Franklin | 1,599 | 1,589 | 2.45 | 6.3 | August 28, 1869 |
| Ackworth | Warren | 115 | 83 | 0.29 | 0.75 | May 9, 1881 |
| Adair | Adair Guthrie | 791 | 781 | 2.2 | 5.7 | February 23, 1884 |
| Adel | Dallas | 6,153 | 3,682 | 3.27 | 8.5 | June 27, 1877 |
| Afton | Union | 874 | 845 | 0.99 | 2.6 | November 30, 1868 |
| Agency | Wapello | 620 | 638 | 0.65 | 1.7 | January 6, 1859 |
| Ainsworth | Washington | 511 | 567 | 0.38 | 0.98 | June 18, 1892 |
| Akron | Plymouth | 1,558 | 1,486 | 1.22 | 3.2 | September 7, 1882 |
| Albert City | Buena Vista | 677 | 699 | 0.54 | 1.4 | December 10, 1900 |
| Albia† | Monroe | 3,721 | 3,766 | 3.19 | 8.3 | January 28, 1857 |
| Albion | Marshall | 448 | 505 | 0.6 | 1.6 | March 8, 1870 |
| Alburnett | Linn | 675 | 673 | 0.82 | 2.1 | June 29, 1912 |
| Alden | Hardin | 763 | 787 | 1.71 | 4.4 | February 11, 1879 |
| Alexander | Franklin | 164 | 175 | 4.27 | 11.1 | March 25, 1902 |
| Algona† | Kossuth | 5,487 | 5,560 | 4.49 | 11.6 | January 31, 1872 |
| Alleman | Polk | 423 | 432 | 2.7 | 7.0 | May 18, 1973 |
| Allerton | Wayne | 430 | 501 | 1.14 | 3.0 | October 1, 1874 |
| Allison† | Butler | 966 | 1,029 | 2.93 | 7.6 | July 25, 1881 |
| Alta | Buena Vista | 2,087 | 1,883 | 1.07 | 2.8 | November 11, 1878 |
| Alta Vista | Chickasaw | 227 | 266 | 0.76 | 2.0 | September 18, 1894 |
| Alton | Sioux | 1,248 | 1,216 | 1.85 | 4.8 | March 8, 1883 |
| Altoona | Polk | 19,565 | 14,541 | 9.35 | 24.2 | March 11, 1876 |
| Alvord | Lyon | 206 | 196 | 0.28 | 0.73 | September 26, 1892 |
| Ames | Story | 66,427 | 58,965 | 24.21 | 62.7 | December 20, 1869 |
| Anamosa† | Jones | 5,450 | 5,533 | 2.6 | 6.7 | December 17, 1867 |
| Andover | Clinton | 109 | 103 | 0.19 | 0.49 | January 12, 1910 |
| Andrew | Jackson | 380 | 434 | 0.27 | 0.70 | August 4, 1863 |
| Anita | Cass | 963 | 972 | 1.7 | 4.4 | May 19, 1875 |
| Ankeny | Polk | 67,887 | 45,582 | 29.33 | 76.0 | February 27, 1903 |
| Anthon | Woodbury | 545 | 565 | 0.71 | 1.8 | July 25, 1890 |
| Aplington | Butler | 1,116 | 1,128 | 0.83 | 2.1 | November 9, 1877 |
| Arcadia | Carroll | 525 | 484 | 0.98 | 2.5 | November 3, 1881 |
| Archer | O'Brien | 117 | 131 | 0.09 | 0.23 | May 5, 1902 |
| Aredale | Butler | 62 | 74 | 0.99 | 2.6 | June 5, 1920 |
| Arion | Crawford | 97 | 108 | 0.47 | 1.2 | May 31, 1894 |
| Arispe | Union | 96 | 100 | 0.52 | 1.3 | October 21, 1904 |
| Arlington | Fayette | 419 | 429 | 1.05 | 2.7 | April 30, 1985 |
| Armstrong | Emmet | 875 | 926 | 0.88 | 2.3 | March 30, 1895 |
| Arnolds Park | Dickinson | 1,110 | 1,126 | 1.57 | 4.1 | March 30, 1897 |
| Arthur | Ida | 222 | 206 | 0.15 | 0.39 | April 21, 1897 |
| Asbury | Dubuque | 5,943 | 4,170 | 2.66 | 6.9 | September 7, 1933 |
| Ashton | Osceola | 436 | 458 | 1.01 | 2.6 | March 28, 1885 |
| Aspinwall | Crawford | 33 | 40 | 0.18 | 0.47 | November 10, 1914 |
| Atalissa | Muscatine | 296 | 311 | 0.14 | 0.36 | March 26, 1900 |
| Atkins | Benton | 2,056 | 1,670 | 1.09 | 2.8 | May 15, 1917 |
| Atlantic† | Cass | 6,792 | 7,112 | 8.32 | 21.5 | November 26, 1869 |
| Auburn | Sac | 265 | 322 | 0.5 | 1.3 | January 10, 1887 |
| Audubon† | Audubon | 2,053 | 2,382 | 1.88 | 4.9 | December 2, 1880 |
| Aurelia | Cherokee | 968 | 1,036 | 1.04 | 2.7 | December 27, 1879 |
| Aurora | Buchanan | 169 | 185 | 0.57 | 1.5 | August 26, 1899 |
| Avoca | Pottawattamie | 1,683 | 1,506 | 2.13 | 5.5 | December 2, 1874 |
| Ayrshire | Palo Alto | 133 | 143 | 0.21 | 0.54 | September 20, 1895 |
| Badger | Webster | 522 | 561 | 1.09 | 2.8 | December 28, 1899 |
| Bagley | Guthrie | 233 | 303 | 0.31 | 0.80 | June 16, 1891 |
| Baldwin | Jackson | 99 | 109 | 0.36 | 0.93 | December 8, 1881 |
| Balltown | Dubuque | 79 | 68 | 0.09 | 0.23 | July 22, 1933 |
| Bancroft | Kossuth | 699 | 732 | 0.55 | 1.4 | February 16, 1884 |
| Bankston | Dubuque | 23 | 25 | 0.29 | 0.75 | September 8, 1933 |
| Barnes City | Mahaska Poweshiek | 156 | 176 | 0.59 | 1.5 | April 20, 1899 |
| Barnum | Webster | 175 | 191 | 0.37 | 0.96 | May 29, 1894 |
| Bassett | Chickasaw | 45 | 66 | 0.37 | 0.96 | November 7, 1896 |
| Batavia | Jefferson | 430 | 499 | 0.6 | 1.6 | January 6, 1868 |
| Battle Creek | Ida | 700 | 713 | 0.5 | 1.3 | November 13, 1880 |
| Baxter | Jasper | 962 | 1,101 | 0.65 | 1.7 | December 13, 1894 |
| Bayard | Guthrie | 405 | 471 | 0.46 | 1.2 | June 14, 1883 |
| Beacon | Mahaska | 445 | 494 | 1.0 | 2.6 | February 7, 1874 |
| Beaconsfield | Ringgold | 15 | 15 | 0.72 | 1.9 | January 18, 1990 |
| Beaman | Grundy | 161 | 191 | 0.19 | 0.49 | April 26, 1884 |
| Beaver | Boone | 46 | 48 | 0.25 | 0.65 | October 5, 1912 |
| Bedford† | Taylor | 1,508 | 1,440 | 1.6 | 4.1 | July 28, 1866 |
| Belle Plaine | Benton | 2,330 | 2,534 | 3.22 | 8.3 | May 26, 1868 |
| Bellevue | Jackson | 2,363 | 2,191 | 1.34 | 3.5 | February 5, 1851 |
| Belmond | Wright | 2,463 | 2,376 | 2.85 | 7.4 | October 21, 1881 |
| Bennett | Cedar | 347 | 405 | 0.2 | 0.52 | December 26, 1896 |
| Benton | Ringgold | 39 | 41 | 0.64 | 1.7 | July 3, 1900 |
| Berkley | Boone | 23 | 32 | 0.21 | 0.54 | October 11, 1912 |
| Bernard | Dubuque | 114 | 112 | 0.11 | 0.28 | June 8, 1897 |
| Bertram | Linn | 269 | 294 | 1.68 | 4.4 | January 17, 1914 |
| Bettendorf | Scott | 39,102 | 33,217 | 21.22 | 55.0 | June 5, 1903 |
| Bevington | Madison Warren | 57 | 63 | 0.45 | 1.2 | February 1, 1916 |
| Birmingham | Van Buren | 367 | 448 | 1.06 | 2.7 | May 20, 1856 |
| Blairsburg | Hamilton | 176 | 215 | 0.65 | 1.7 | December 21, 1900 |
| Blairstown | Benton | 713 | 692 | 0.52 | 1.3 | October 15, 1868 |
| Blakesburg | Wapello | 274 | 296 | 0.27 | 0.70 | December 31, 1900 |
| Blanchard | Page | 29 | 38 | 0.23 | 0.60 | June 11, 1880 |
| Blencoe | Monona | 233 | 224 | 0.76 | 2.0 | October 24, 1891 |
| Blockton | Taylor | 125 | 192 | 0.65 | 1.7 | March 28, 1890 |
| Bloomfield† | Davis | 2,682 | 2,640 | 2.25 | 5.8 | January 13, 1855 |
| Blue Grass | Scott Muscatine | 1,666 | 1,452 | 2.89 | 7.5 | December 10, 1903 |
| Bode | Humboldt | 302 | 302 | 0.41 | 1.1 | February 20, 1892 |
| Bonaparte | Van Buren | 359 | 433 | 0.37 | 0.96 | January 31, 1899 |
| Bondurant | Polk | 7,365 | 3,860 | 8.38 | 21.7 | December 23, 1897 |
| Boone† | Boone | 12,460 | 12,661 | 9.02 | 23.4 | October 24, 1876 |
| Bouton | Dallas | 127 | 129 | 0.14 | 0.36 | September 27, 1911 |
| Boxholm | Boone | 181 | 195 | 1.02 | 2.6 | September 29, 1913 |
| Boyden | Sioux | 701 | 707 | 0.75 | 1.9 | May 24, 1889 |
| Braddyville | Page | 147 | 159 | 0.53 | 1.4 | February 9, 1880 |
| Bradgate | Humboldt | 75 | 86 | 0.35 | 0.91 | June 20, 1893 |
| Brandon | Buchanan | 341 | 309 | 0.32 | 0.83 | April 14, 1905 |
| Brayton | Audubon | 143 | 128 | 0.62 | 1.6 | May 17, 1899 |
| Breda | Carroll | 500 | 483 | 0.74 | 1.9 | October 30, 1883 |
| Bridgewater | Adair | 148 | 182 | 0.29 | 0.75 | April 1, 1905 |
| Brighton | Washington | 600 | 652 | 0.71 | 1.8 | July 26, 1870 |
| Bristow | Butler | 145 | 160 | 0.94 | 2.4 | December 15, 1881 |
| Britt | Hancock | 2,044 | 2,069 | 1.26 | 3.3 | June 23, 1881 |
| Bronson | Woodbury | 294 | 322 | 0.31 | 0.80 | June 8, 1967 |
| Brooklyn | Poweshiek | 1,502 | 1,468 | 1.23 | 3.2 | May 3, 1869 |
| Brunsville | Plymouth | 129 | 151 | 0.24 | 0.62 | July 18, 1911 |
| Buck Grove | Crawford | 34 | 43 | 0.36 | 0.93 | June 29, 1906 |
| Buckeye | Hardin | 86 | 108 | 1.0 | 2.6 | 1901 |
| Buffalo | Scott | 1,176 | 1,270 | 6.45 | 16.7 | July 15, 1875 |
| Buffalo Center | Winnebago | 857 | 905 | 1.07 | 2.8 | February 17, 1894 |
| Burlington† | Des Moines | 23,982 | 25,663 | 14.48 | 37.5 | June 10, 1845 |
| Burt | Kossuth | 418 | 533 | 0.44 | 1.1 | November 28, 1893 |
| Bussey | Marion | 387 | 422 | 0.33 | 0.85 | April 9, 1895 |
| Calamus | Clinton | 356 | 439 | 0.48 | 1.2 | October 6, 1875 |
| Callender | Webster | 368 | 376 | 0.52 | 1.3 | November 17, 1893 |
| Calmar | Winneshiek | 1,125 | 978 | 1.07 | 2.8 | July 14, 1869 |
| Calumet | O'Brien | 146 | 170 | 0.27 | 0.70 | January 31, 1895 |
| Camanche | Clinton | 4,570 | 4,448 | 8.68 | 22.5 | January 28, 1857 |
| Cambridge | Story | 827 | 827 | 1.1 | 2.8 | December 6, 1881 |
| Cantril | Van Buren | 224 | 222 | 0.51 | 1.3 | June 4, 1874 |
| Carbon | Adams | 36 | 34 | 0.71 | 1.8 | July 18, 1903 |
| Carlisle | Warren Polk | 4,160 | 3,876 | 5.56 | 14.4 | May 10, 1870 |
| Carpenter | Mitchell | 87 | 109 | 0.16 | 0.41 | April 20, 1880 |
| Carroll† | Carroll | 10,321 | 10,103 | 5.69 | 14.7 | September 27, 1869 |
| Carson | Pottawattamie | 766 | 812 | 0.71 | 1.8 | March 28, 1881 |
| Carter Lake | Pottawattamie | 3,791 | 3,785 | 1.87 | 4.8 | July 5, 1930 |
| Cascade | Dubuque Jones | 2,386 | 1,978 | 1.87 | 4.8 | December 14, 1880 |
| Casey | Guthrie Adair | 387 | 426 | 0.74 | 1.9 | June 29, 1880 |
| Castalia | Winneshiek | 145 | 173 | 0.58 | 1.5 | August 16, 1901 |
| Castana | Monona | 107 | 147 | 0.93 | 2.4 | March 3, 1891 |
| Cedar Falls | Black Hawk | 40,713 | 39,260 | 28.75 | 74.5 | February 24, 1858 |
| Cedar Rapids† | Linn | 137,710 | 126,326 | 70.8 | 183 | January 15, 1849 |
| Center Point | Linn | 2,579 | 2,421 | 2.6 | 6.7 | February 6, 1875 |
| Centerville† | Appanoose | 5,412 | 5,528 | 4.86 | 12.6 | January 23, 1857 |
| Central City | Linn | 1,264 | 1,257 | 0.95 | 2.5 | July 6, 1889 |
| Centralia | Dubuque | 116 | 134 | 0.58 | 1.5 | June 3, 1933 |
| Chariton† | Lucas | 4,193 | 4,321 | 3.82 | 9.9 | December 9, 1874 |
| Charles City† | Floyd | 7,396 | 7,652 | 6.22 | 16.1 | May 1, 1869 |
| Charlotte | Clinton | 389 | 394 | 0.58 | 1.5 | December 5, 1904 |
| Charter Oak | Crawford | 535 | 502 | 0.48 | 1.2 | February 6, 1891 |
| Chatsworth | Sioux | 75 | 79 | 0.49 | 1.3 | December 31, 1900 |
| Chelsea | Tama | 229 | 267 | 1.01 | 2.6 | March 4, 1878 |
| Cherokee† | Cherokee | 5,199 | 5,253 | 6.43 | 16.7 | April 5, 1873 |
| Chester | Howard | 139 | 127 | 1.34 | 3.5 | September 22, 1900 |
| Chillicothe | Wapello | 76 | 97 | 0.23 | 0.60 | December 22, 1881 |
| Churdan | Greene | 365 | 386 | 2.11 | 5.5 | March 25, 1884 |
| Cincinnati | Appanoose | 290 | 357 | 1.74 | 4.5 | February 13, 1875 |
| Clare | Webster | 136 | 146 | 0.51 | 1.3 | March 29, 1892 |
| Clarence | Cedar | 1,039 | 974 | 0.68 | 1.8 | February 26, 1866 |
| Clarinda† | Page | 5,369 | 5,572 | 5.19 | 13.4 | December 8, 1866 |
| Clarion† | Wright | 2,810 | 2,850 | 3.26 | 8.4 | October 15, 1881 |
| Clarksville | Butler | 1,264 | 1,439 | 1.33 | 3.4 | May 11, 1874 |
| Clayton | Clayton | 45 | 43 | 0.49 | 1.3 | November 23, 1901 |
| Clear Lake | Cerro Gordo | 7,687 | 7,777 | 10.8 | 28 | May 26, 1871 |
| Clearfield | Taylor Ringgold | 278 | 363 | 1.26 | 3.3 | December 16, 1882 |
| Cleghorn | Cherokee | 240 | 240 | 0.34 | 0.88 | January 25, 1901 |
| Clemons | Marshall | 140 | 148 | 0.27 | 0.70 | May 25, 1903 |
| Clermont | Fayette | 586 | 632 | 1.23 | 3.2 | June 15, 1875 |
| Clinton† | Clinton | 24,469 | 26,885 | 35.15 | 91.0 | January 26, 1857 |
| Clio | Wayne | 67 | 80 | 0.75 | 1.9 | February 20, 1882 |
| Clive | Polk Dallas | 18,601 | 15,447 | 7.59 | 19.7 | October 9, 1956 |
| Clutier | Tama | 213 | 213 | 0.76 | 2.0 | January 16, 1901 |
| Coburg | Montgomery | 26 | 42 | 0.29 | 0.75 | January 1, 1875 |
| Coggon | Linn | 701 | 658 | 0.62 | 1.6 | June 14, 1892 |
| Coin | Page | 176 | 193 | 0.8 | 2.1 | July 30, 1881 |
| Colesburg | Delaware | 386 | 404 | 0.29 | 0.75 | February 21, 1893 |
| Colfax | Jasper | 2,255 | 1,925 | 1.79 | 4.6 | August 10, 1875 |
| College Springs | Page | 172 | 214 | 1.1 | 2.8 | January 19, 1875 |
| Collins | Story | 495 | 495 | 0.49 | 1.3 | December 28, 1894 |
| Colo | Story | 845 | 876 | 1.06 | 2.7 | April 26, 1876 |
| Columbus City | Louisa | 392 | 391 | 0.24 | 0.62 | November 26, 1870 |
| Columbus Junction | Louisa | 1,830 | 1,899 | 2.19 | 5.7 | May 25, 1874 |
| Colwell | Floyd | 55 | 73 | 0.18 | 0.47 | September 27, 1921 |
| Conesville | Muscatine | 352 | 432 | 0.36 | 0.93 | March 21, 1874 |
| Conrad | Grundy | 1,093 | 1,108 | 1.2 | 3.1 | November 15, 1886 |
| Conway | Taylor | 17 | 41 | 0.22 | 0.57 | December 27, 1878 |
| Coon Rapids | Carroll Guthrie | 1,300 | 1,305 | 1.78 | 4.6 | November 2, 1882 |
| Coppock | Henry Washington Jefferson | 36 | 47 | 0.23 | 0.60 | August 24, 1901 |
| Coralville | Johnson | 22,318 | 18,907 | 12.01 | 31.1 | November 22, 1873 |
| Corning† | Adams | 1,564 | 1,635 | 1.58 | 4.1 | December 13, 1871 |
| Correctionville | Woodbury | 766 | 821 | 0.57 | 1.5 | October 3, 1882 |
| Corwith | Hancock | 266 | 309 | 1.48 | 3.8 | June 1, 1886 |
| Corydon† | Wayne | 1,526 | 1,585 | 1.39 | 3.6 | April 27, 1867 |
| Cotter | Louisa | 39 | 48 | 0.25 | 0.65 | April 1, 1912 |
| Coulter | Franklin | 219 | 281 | 2.45 | 6.3 | April 24, 1909 |
| Council Bluffs† | Pottawattamie | 62,799 | 62,230 | 40.97 | 106.1 | January 19, 1853 |
| Craig | Plymouth | 79 | 89 | 0.09 | 0.23 | April 6, 1911 |
| Crawfordsville | Washington | 277 | 264 | 0.35 | 0.91 | March 26, 1891 |
| Crescent | Pottawattamie | 628 | 617 | 1.09 | 2.8 | October 16, 1959 |
| Cresco† | Howard | 3,888 | 3,868 | 3.35 | 8.7 | June 6, 1868 |
| Creston† | Union | 7,536 | 7,834 | 5.19 | 13.4 | April 22, 1871 |
| Cromwell | Union | 105 | 107 | 0.29 | 0.75 | November 24, 1893 |
| Crystal Lake | Hancock | 253 | 250 | 0.25 | 0.65 | April 19, 1898 |
| Cumberland | Cass | 251 | 262 | 0.6 | 1.6 | May 2, 1893 |
| Cumming | Warren | 436 | 351 | 2.56 | 6.6 | October 21, 1924 |
| Curlew | Palo Alto | 37 | 58 | 0.76 | 2.0 | May 22, 1902 |
| Cushing | Woodbury | 230 | 220 | 0.32 | 0.83 | November 21, 1892 |
| Cylinder | Palo Alto | 87 | 88 | 0.07 | 0.18 | April 5, 1900 |
| Dakota City† | Humboldt | 759 | 843 | 0.74 | 1.9 | June 22, 1878 |
| Dallas Center | Dallas | 1,901 | 1,623 | 4.58 | 11.9 | March 22, 1880 |
| Dana | Greene | 38 | 71 | 0.28 | 0.73 | July 22, 1907 |
| Danbury | Woodbury | 320 | 348 | 0.4 | 1.0 | October 1, 1881 |
| Danville | Des Moines | 927 | 934 | 0.75 | 1.9 | September 27, 1902 |
| Davenport† | Scott | 101,724 | 99,685 | 62.95 | 163.0 | February 5, 1881 |
| Davis City | Decatur | 179 | 204 | 0.59 | 1.5 | May 19, 1877 |
| Dawson | Dallas | 116 | 131 | 0.48 | 1.2 | April 25, 1908 |
| Dayton | Webster | 772 | 837 | 0.85 | 2.2 | July 8, 1881 |
| De Soto | Dallas | 915 | 1,050 | 1.52 | 3.9 | April 28, 1875 |
| DeWitt | Clinton | 5,514 | 5,322 | 5.98 | 15.5 | September 20, 1858 |
| Decatur City | Decatur | 175 | 197 | 0.4 | 1.0 | January 8, 1875 |
| Decorah† | Winneshiek | 7,587 | 8,127 | 7.01 | 18.2 | June 30, 1857 |
| Dedham | Carroll | 224 | 266 | 0.58 | 1.5 | April 2, 1884 |
| Deep River | Poweshiek | 249 | 279 | 0.43 | 1.1 | June 15, 1887 |
| Defiance | Shelby | 245 | 284 | 0.39 | 1.0 | December 4, 1882 |
| Delaware | Delaware | 142 | 159 | 0.8 | 2.1 | July 22, 1915 |
| Delhi | Delaware | 420 | 460 | 0.97 | 2.5 | April 26, 1909 |
| Delmar | Clinton | 542 | 525 | 0.76 | 2.0 | June 10, 1876 |
| Deloit | Crawford | 250 | 264 | 0.42 | 1.1 | May 19, 1900 |
| Delphos | Ringgold | 26 | 25 | 0.22 | 0.57 | April 3, 1920 |
| Delta | Keokuk | 264 | 328 | 0.93 | 2.4 | March 22, 1877 |
| Denison† | Crawford | 8,373 | 8,298 | 6.54 | 16.9 | October 2, 1875 |
| Denver | Bremer | 1,919 | 1,780 | 1.64 | 4.2 | June 30, 1896 |
| Derby | Lucas | 90 | 115 | 0.26 | 0.67 | February 4, 1901 |
| Des Moines †† | Polk Warren | 214,133 | 203,433 | 80.87 | 209.5 | October 18, 1851 |
| Dexter | Dallas | 640 | 611 | 2.35 | 6.1 | January 7, 1871 |
| Diagonal | Ringgold | 344 | 330 | 0.9 | 2.3 | March 6, 1896 |
| Dickens | Clay | 146 | 185 | 0.84 | 2.2 | April 7, 1909 |
| Dike | Grundy | 1,304 | 1,209 | 1.39 | 3.6 | January 16, 1901 |
| Dixon | Scott | 202 | 247 | 0.15 | 0.39 | May 12, 1909 |
| Dolliver | Emmet | 65 | 66 | 0.36 | 0.93 | April 16, 1902 |
| Donahue | Scott | 335 | 346 | 0.35 | 0.91 | May 1, 1909 |
| Donnellson | Lee | 885 | 912 | 1.26 | 3.3 | October 25, 1892 |
| Doon | Lyon | 619 | 577 | 0.57 | 1.5 | March 8, 1892 |
| Dougherty | Cerro Gordo | 62 | 58 | 0.55 | 1.4 | December 29, 1900 |
| Dow City | Crawford | 485 | 510 | 0.32 | 0.83 | February 22, 1884 |
| Dows | Wright Franklin | 521 | 538 | 0.77 | 2.0 | May 3, 1892 |
| Drakesville | Davis | 164 | 184 | 0.25 | 0.65 | May 5, 1866 |
| Dubuque† | Dubuque | 59,667 | 57,637 | 29.97 | 77.6 | January 28, 1857 |
| Dumont | Butler | 634 | 637 | 1.76 | 4.6 | January 24, 1896 |
| Duncombe | Webster | 381 | 410 | 1.97 | 5.1 | January 25, 1893 |
| Dundee | Delaware | 198 | 174 | 0.36 | 0.93 | August 30, 1917 |
| Dunkerton | Black Hawk | 842 | 852 | 0.98 | 2.5 | March 18, 1899 |
| Dunlap | Harrison Crawford | 1,038 | 1,042 | 1.13 | 2.9 | January 1871 |
| Durango | Dubuque | 20 | 22 | 0.04 | 0.10 | June 5, 1933 |
| Durant | Cedar Scott Muscatine | 1,871 | 1,832 | 1.15 | 3.0 | July 1, 1867 |
| Dyersville | Dubuque Delaware | 4,477 | 4,058 | 5.63 | 14.6 | November 9, 1872 |
| Dysart | Tama | 1,281 | 1,379 | 1.25 | 3.2 | May 30, 1881 |
| Eagle Grove | Wright | 3,601 | 3,583 | 4.04 | 10.5 | October 16, 1882 |
| Earlham | Madison | 1,410 | 1,450 | 0.97 | 2.5 | April 26, 1870 |
| Earling | Shelby | 397 | 437 | 0.6 | 1.6 | June 1, 1892 |
| Earlville | Delaware | 716 | 812 | 0.55 | 1.4 | June 12, 1882 |
| Early | Sac | 587 | 557 | 0.39 | 1.0 | May 22, 1883 |
| East Peru | Madison | 115 | 125 | 0.94 | 2.4 | March 31, 1897 |
| Eddyville | Wapello Mahaska Monroe | 970 | 1,024 | 1.18 | 3.1 | February 22, 1900 |
| Edgewood | Delaware Clayton | 909 | 864 | 0.85 | 2.2 | April 6, 1899 |
| Elberon | Tama | 184 | 196 | 0.65 | 1.7 | October 28, 1893 |
| Eldon | Wapello | 783 | 927 | 1.11 | 2.9 | April 29, 1872 |
| Eldora† | Hardin | 2,663 | 2,732 | 4.33 | 11.2 | July 1, 1895 |
| Eldridge | Scott | 6,726 | 5,651 | 9.48 | 24.6 | May 1, 1900 |
| Elgin | Fayette | 685 | 683 | 0.66 | 1.7 | March 14, 1892 |
| Elk Horn | Shelby | 601 | 662 | 0.77 | 2.0 | February 28, 1910 |
| Elk Run Heights | Black Hawk | 1,069 | 1,117 | 1.06 | 2.7 | May 31, 1951 |
| Elkader† | Clayton | 1,209 | 1,273 | 1.39 | 3.6 | May 1, 1900 |
| Elkhart | Polk | 882 | 683 | 1.58 | 4.1 | July 27, 1904 |
| Elkport | Clayton | 29 | 37 | 0.25 | 0.65 | February 24, 1896 |
| Elliott | Montgomery | 338 | 350 | 0.42 | 1.1 | March 14, 1882 |
| Ellston | Ringgold | 19 | 43 | 0.20 | 0.52 | January 1, 1895 |
| Ellsworth | Hamilton | 508 | 531 | 0.9 | 2.3 | October 12, 1893 |
| Elma | Howard | 505 | 546 | 1.29 | 3.3 | July 11, 1891 |
| Ely | Linn | 2,328 | 1,776 | 1.44 | 3.7 | August 12, 1903 |
| Emerson | Mills | 403 | 438 | 0.26 | 0.67 | December 2, 1875 |
| Emmetsburg† | Palo Alto | 3,706 | 3,904 | 3.81 | 9.9 | November 17, 1877 |
| Epworth | Dubuque | 2,023 | 1,860 | 1.56 | 4.0 | October 20, 1879 |
| Essex | Page | 722 | 798 | 1.5 | 3.9 | January 20, 1876 |
| Estherville† | Emmet | 5,904 | 6,360 | 5.32 | 13.8 | October 4, 1881 |
| Evansdale | Black Hawk | 4,561 | 4,751 | 4.05 | 10.5 | November 13, 1947 |
| Everly | Clay | 575 | 603 | 1.09 | 2.8 | April 7, 1902 |
| Exira | Audubon | 787 | 840 | 1.02 | 2.6 | December 13, 1880 |
| Exline | Appanoose | 160 | 160 | 0.99 | 2.6 | June 20, 1904 |
| Fairbank | Buchanan Fayette | 1,111 | 1,113 | 0.71 | 1.8 | May 12, 1891 |
| Fairfax | Linn | 2,828 | 2,123 | 1.94 | 5.0 | August 11, 1930 |
| Fairfield† | Jefferson | 9,416 | 9,464 | 6.26 | 16.2 | May 14, 1875 |
| Farley | Dubuque | 1,766 | 1,537 | 1.85 | 4.8 | March 1, 1879 |
| Farmersburg | Clayton | 271 | 302 | 0.4 | 1.0 | June 1, 1902 |
| Farmington | Van Buren | 579 | 664 | 0.47 | 1.2 | January 11, 1841 |
| Farnhamville | Calhoun Webster | 383 | 371 | 0.65 | 1.7 | April 1, 1893 |
| Farragut | Fremont | 490 | 485 | 0.41 | 1.1 | January 21, 1878 |
| Fayette | Fayette | 1,256 | 1,338 | 1.48 | 3.8 | March 14, 1874 |
| Fenton | Kossuth | 271 | 279 | 0.34 | 0.88 | June 10, 1903 |
| Ferguson | Marshall | 97 | 126 | 0.26 | 0.67 | December 4, 1906 |
| Fertile | Worth | 305 | 370 | 0.94 | 2.4 | April 10, 1908 |
| Floris | Davis | 116 | 138 | 0.48 | 1.2 | May 12, 1913 |
| Floyd | Floyd | 313 | 335 | 0.6 | 1.6 | February 26, 1899 |
| Fonda | Pocahontas | 636 | 631 | 1.05 | 2.7 | March 21, 1884 |
| Fontanelle | Adair | 676 | 672 | 0.96 | 2.5 | August 23, 1871 |
| Forest City† | Winnebago Hancock | 4,285 | 4,151 | 4.64 | 12.0 | June 14, 1878 |
| Fort Atkinson | Winneshiek | 312 | 349 | 0.31 | 0.80 | June 5, 1895 |
| Fort Dodge† | Webster | 24,871 | 25,206 | 16.05 | 41.6 | October 26, 1869 |
| Fort Madison† | Lee | 10,270 | 11,051 | 9.49 | 24.6 | February 5, 1895 |
| Fostoria | Clay | 230 | 231 | 0.47 | 1.2 | January 30, 1912 |
| Franklin | Lee | 131 | 143 | 0.15 | 0.39 | November 14, 1874 |
| Fraser | Boone | 101 | 102 | 0.83 | 2.1 | February 8, 1904 |
| Fredericksburg | Chickasaw | 987 | 931 | 0.86 | 2.2 | December 18, 1894 |
| Frederika | Bremer | 204 | 183 | 0.2 | 0.52 | March 28, 1896 |
| Fredonia | Louisa | 222 | 244 | 0.17 | 0.44 | May 30, 1874 |
| Fremont | Mahaska | 708 | 743 | 1.03 | 2.7 | March 14, 1883 |
| Fruitland | Muscatine | 963 | 977 | 1.8 | 4.7 | August 24, 1972 |
| Galt | Wright | 26 | 32 | 0.54 | 1.4 | January 2, 1913 |
| Galva | Ida | 435 | 434 | 0.71 | 1.8 | September 26, 1889 |
| Garber | Clayton | 76 | 88 | 0.23 | 0.60 | November 18, 1907 |
| Garden Grove | Decatur | 174 | 211 | 0.69 | 1.8 | November 14, 1879 |
| Garnavillo | Clayton | 763 | 745 | 1.02 | 2.6 | November 21, 1907 |
| Garner† | Hancock | 3,065 | 3,129 | 2.05 | 5.3 | November 19, 1881 |
| Garrison | Benton | 344 | 371 | 0.25 | 0.65 | June 9, 1883 |
| Garwin | Tama | 481 | 527 | 1.01 | 2.6 | June 5, 1890 |
| Geneva | Franklin | 136 | 165 | 0.42 | 1.1 | April 7, 1903 |
| George | Lyon | 1,077 | 1,080 | 2.4 | 6.2 | March 27, 1890 |
| Gibson | Keokuk | 63 | 61 | 0.07 | 0.18 | December 14, 1954 |
| Gilbert | Story | 1,211 | 1,082 | 0.91 | 2.4 | July 15, 1882 |
| Gilbertville | Black Hawk | 794 | 712 | 0.4 | 1.0 | April 9, 1917 |
| Gillett Grove | Clay | 30 | 49 | 0.19 | 0.49 | August 29, 1974 |
| Gilman | Marshall | 542 | 509 | 0.54 | 1.4 | April 24, 1876 |
| Gilmore City | Humboldt Pocahontas | 487 | 504 | 1.25 | 3.2 | April 16, 1887 |
| Gladbrook | Tama | 799 | 945 | 0.7 | 1.8 | December 20, 1880 |
| Glenwood† | Mills | 5,073 | 5,269 | 2.95 | 7.6 | January 17, 1857 |
| Glidden | Carroll | 1,151 | 1,146 | 1.11 | 2.9 | August 22, 1873 |
| Goldfield | Wright | 634 | 635 | 1.19 | 3.1 | March 19, 1885 |
| Goodell | Hancock | 140 | 139 | 0.43 | 1.1 | February 3, 1893 |
| Goose Lake | Clinton | 239 | 240 | 0.32 | 0.83 | December 26, 1908 |
| Gowrie | Webster | 952 | 1,037 | 1.45 | 3.8 | March 18, 1881 |
| Graettinger | Palo Alto | 832 | 844 | 0.77 | 2.0 | September 30, 1893 |
| Graf | Dubuque | 76 | 79 | 0.14 | 0.36 | August 30, 1933 |
| Grafton | Worth | 216 | 252 | 0.33 | 0.85 | April 10, 1896 |
| Grand Junction | Greene | 725 | 824 | 0.97 | 2.5 | May 6, 1872 |
| Grand Mound | Clinton | 615 | 642 | 1.82 | 4.7 | February 11, 1884 |
| Grand River | Decatur | 196 | 236 | 0.21 | 0.54 | December 21, 1899 |
| Grandview | Louisa | 437 | 556 | 0.23 | 0.60 | February 18, 1901 |
| Granger | Dallas Polk | 1,654 | 1,244 | 1.45 | 3.8 | September 6, 1905 |
| Grant | Montgomery | 86 | 92 | 0.74 | 1.9 | February 27, 1912 |
| Granville | Sioux | 310 | 312 | 0.29 | 0.75 | June 22, 1891 |
| Gravity | Taylor | 154 | 188 | 0.3 | 0.78 | May 26, 1882 |
| Gray | Audubon | 61 | 63 | 1.0 | 2.6 | November 10, 1894 |
| Greeley | Delaware | 217 | 256 | 0.37 | 0.96 | July 8, 1892 |
| Greene | Butler Floyd | 990 | 1,130 | 1.14 | 3.0 | July 15, 1879 |
| Greenfield† | Adair | 2,062 | 1,982 | 1.81 | 4.7 | May 22, 1876 |
| Greenville | Clay | 71 | 75 | 0.18 | 0.47 | December 30, 1916 |
| Grimes | Polk Dallas | 15,392 | 8,246 | 11.84 | 30.7 | May 7, 1894 |
| Grinnell | Poweshiek | 9,564 | 9,218 | 5.6 | 15 | April 28, 1865 |
| Griswold | Cass | 994 | 1,036 | 0.62 | 1.6 | December 13, 1885 |
| Grundy Center† | Grundy | 2,796 | 2,706 | 2.53 | 6.6 | April 17, 1877 |
| Gruver | Emmet | 63 | 94 | 0.13 | 0.34 | February 4, 1913 |
| Guernsey | Poweshiek | 63 | 63 | 0.18 | 0.47 | September 4, 1906 |
| Guthrie Center† | Guthrie | 1,593 | 1,569 | 2.47 | 6.4 | June 25, 1880 |
| Guttenberg | Clayton | 1,817 | 1,919 | 2.09 | 5.4 | January 27, 1857 |
| Halbur | Carroll | 243 | 246 | 0.19 | 0.49 | April 22, 1902 |
| Hamburg | Fremont | 890 | 1,187 | 1.1 | 2.8 | April 1, 1867 |
| Hamilton | Marion | 119 | 130 | 0.54 | 1.4 | April 11, 1900 |
| Hampton† | Franklin | 4,337 | 4,461 | 4.43 | 11.5 | November 19, 1870 |
| Hancock | Pottawattamie | 200 | 196 | 0.74 | 1.9 | May 16, 1891 |
| Hanlontown | Worth | 206 | 226 | 0.97 | 2.5 | January 18, 1902 |
| Hansell | Franklin | 82 | 98 | 0.23 | 0.60 | May 7, 1918 |
| Harcourt | Webster | 264 | 303 | 1.0 | 2.6 | February 11, 1896 |
| Hardy | Humboldt | 57 | 47 | 0.44 | 1.1 | April 13, 1915 |
| Harlan† | Shelby | 4,893 | 5,106 | 4.39 | 11.4 | April 25, 1879 |
| Harper | Keokuk | 118 | 114 | 0.09 | 0.23 | November 17, 1879 |
| Harpers Ferry | Allamakee | 262 | 328 | 0.63 | 1.6 | December 24, 1901 |
| Harris | Osceola | 151 | 170 | 0.79 | 2.0 | 1903 |
| Hartford | Warren | 733 | 771 | 1.03 | 2.7 | June 29, 1913 |
| Hartley | O'Brien | 1,605 | 1,672 | 1.3 | 3.4 | July 24, 1888 |
| Hartwick | Poweshiek | 92 | 86 | 0.13 | 0.34 | 1912 |
| Harvey | Marion | 236 | 235 | 0.68 | 1.8 | December 12, 1903 |
| Hastings | Mills | 152 | 152 | 0.41 | 1.1 | May 26, 1879 |
| Havelock | Pocahontas | 130 | 138 | 0.57 | 1.5 | February 16, 1892 |
| Haverhill | Marshall | 165 | 173 | 0.13 | 0.34 | July 12, 1968 |
| Hawarden | Sioux | 2,700 | 2,538 | 2.89 | 7.5 | March 18, 1887 |
| Hawkeye | Fayette | 438 | 449 | 0.67 | 1.7 | April 9, 1895 |
| Hayesville | Keokuk | 41 | 50 | 0.25 | 0.65 | October 13, 1916 |
| Hazleton | Buchanan | 713 | 823 | 0.75 | 1.9 | June 22, 1892 |
| Hedrick | Keokuk | 728 | 764 | 1.53 | 4.0 | April 23, 1883 |
| Henderson | Mills | 144 | 185 | 0.21 | 0.54 | May 18, 1893 |
| Hepburn | Page | 26 | 23 | 0.08 | 0.21 | January 13, 1883 |
| Hiawatha | Linn | 7,183 | 7,024 | 4.23 | 11.0 | June 12, 1950 |
| Hills | Johnson | 863 | 703 | 0.63 | 1.6 | 1906 |
| Hillsboro | Henry | 163 | 180 | 0.51 | 1.3 | July 19, 1916 |
| Hinton | Plymouth | 935 | 928 | 0.69 | 1.8 | June 6, 1908 |
| Holland | Grundy | 269 | 282 | 0.25 | 0.65 | June 29, 1897 |
| Holstein | Ida | 1,501 | 1,396 | 1.49 | 3.9 | April 25, 1883 |
| Holy Cross | Dubuque | 356 | 374 | 0.34 | 0.88 | August 20, 1898 |
| Hopkinton | Delaware | 622 | 628 | 0.62 | 1.6 | March 3, 1874 |
| Hornick | Woodbury | 255 | 225 | 0.25 | 0.65 | June 23, 1896 |
| Hospers | Sioux | 718 | 698 | 0.48 | 1.2 | December 6, 1890 |
| Houghton | Lee | 141 | 146 | 0.31 | 0.80 | February 19, 1962 |
| Hubbard | Hardin | 860 | 845 | 1.84 | 4.8 | November 1, 1881 |
| Hudson | Black Hawk | 2,546 | 2,282 | 8.4 | 22 | July 1, 1893 |
| Hull | Sioux | 2,384 | 2,146 | 1.2 | 3.1 | May 15, 1886 |
| Humboldt | Humboldt | 4,792 | 4,690 | 4.64 | 12.0 | March 22, 1874 |
| Humeston | Wayne | 465 | 494 | 0.61 | 1.6 | March 4, 1881 |
| Huxley | Story | 4,244 | 3,317 | 3.15 | 8.2 | August 27, 1902 |
| Ida Grove† | Ida | 2,051 | 2,142 | 2.1 | 5.4 | May 31, 1878 |
| Imogene | Fremont | 39 | 72 | 0.2 | 0.52 | February 18, 1881 |
| Independence† | Buchanan | 6,064 | 5,966 | 6.08 | 15.7 | October 15, 1864 |
| Indianola† | Warren | 15,833 | 14,782 | 11.25 | 29.1 | October 5, 1863 |
| Inwood | Lyon | 928 | 814 | 1.34 | 3.5 | April 25, 1893 |
| Ionia | Chickasaw | 226 | 291 | 0.55 | 1.4 | April 23, 1891 |
| Iowa City† | Johnson | 74,828 | 67,862 | 25.01 | 64.8 | January 24, 1853 |
| Iowa Falls | Hardin | 5,106 | 5,238 | 5.36 | 13.9 | May 4, 1869 |
| Ireton | Sioux | 590 | 609 | 1.01 | 2.6 | October 13, 1890 |
| Irwin | Shelby | 319 | 341 | 0.6 | 1.6 | May 20, 1892 |
| Jackson Junction | Winneshiek | 37 | 58 | 5.99 | 15.5 | January 9, 1897 |
| Jamaica | Guthrie | 195 | 224 | 0.46 | 1.2 | January 4, 1901 |
| Janesville | Bremer Black Hawk | 1,034 | 930 | 1.44 | 3.7 | October 29, 1895 |
| Jefferson† | Greene | 4,182 | 4,345 | 5.97 | 15.5 | November 20, 1871 |
| Jesup | Buchanan Black Hawk | 2,508 | 2,520 | 1.78 | 4.6 | December 21, 1875 |
| Jewell Junction | Hamilton | 1,216 | 1,215 | 3.87 | 10.0 | October 22, 1880 |
| Johnston | Polk | 24,064 | 17,278 | 17.16 | 44.4 | September 19, 1969 |
| Joice | Worth | 208 | 222 | 1.0 | 2.6 | June 4, 1913 |
| Jolley | Calhoun | 28 | 41 | 0.11 | 0.28 | November 16, 1895 |
| Kalona | Washington | 2,630 | 2,363 | 2.04 | 5.3 | May 22, 1890 |
| Kamrar | Hamilton | 179 | 199 | 0.86 | 2.2 | June 6, 1896 |
| Kanawha | Hancock | 658 | 652 | 2.01 | 5.2 | April 18, 1902 |
| Kellerton | Ringgold | 243 | 315 | 0.66 | 1.7 | December 3, 1881 |
| Kelley | Story | 304 | 309 | 0.68 | 1.8 | January 31, 1900 |
| Kellogg | Jasper | 606 | 599 | 0.37 | 0.96 | February 6, 1874 |
| Kensett | Worth | 257 | 266 | 1.53 | 4.0 | February 10, 1894 |
| Keokuk† | Lee | 9,900 | 10,780 | 9.13 | 23.6 | December 13, 1848 |
| Keomah Village | Mahaska | 110 | 84 | 0.03 | 0.078 | August 3, 1973 |
| Keosauqua† | Van Buren | 936 | 1,006 | 1.45 | 3.8 | February 6, 1851 |
| Keota | Keokuk | 897 | 1,009 | 0.63 | 1.6 | December 18, 1873 |
| Keswick | Keokuk | 242 | 246 | 0.43 | 1.1 | July 5, 1912 |
| Keystone | Benton | 599 | 622 | 0.45 | 1.2 | December 15, 1893 |
| Kimballton | Audubon | 291 | 322 | 0.77 | 2.0 | June 5, 1980 |
| Kingsley | Plymouth | 1,396 | 1,411 | 1.61 | 4.2 | January 15, 1884 |
| Kinross | Keokuk | 80 | 73 | 0.2 | 0.52 | September 10, 1898 |
| Kirkman | Shelby | 56 | 64 | 0.28 | 0.73 | July 6, 1892 |
| Kirkville | Wapello | 157 | 167 | 0.56 | 1.5 | December 2, 1883 |
| Kiron | Crawford | 267 | 279 | 0.21 | 0.54 | June 22, 1900 |
| Klemme | Hancock | 441 | 507 | 0.51 | 1.3 | February 9, 1899 |
| Knierim | Calhoun | 53 | 60 | 1.01 | 2.6 | June 13, 1901 |
| Knoxville† | Marion | 7,595 | 7,313 | 4.63 | 12.0 | January 24, 1855 |
| La Motte | Jackson | 237 | 260 | 0.46 | 1.2 | May 24, 1879 |
| La Porte City | Black Hawk | 2,284 | 2,285 | 2.55 | 6.6 | January 31, 1871 |
| Lacona | Warren | 345 | 361 | 0.36 | 0.93 | November 25, 1881 |
| Ladora | Iowa | 229 | 283 | 0.3 | 0.78 | December 27, 1879 |
| Lake City | Calhoun | 1,731 | 1,727 | 4.81 | 12.5 | March 14, 1887 |
| Lake Mills | Winnebago | 2,143 | 2,027 | 2.7 | 7.0 | June 7, 1880 |
| Lake Park | Dickinson | 1,167 | 1,105 | 1.55 | 4.0 | July 1, 1892 |
| Lake View | Sac | 1,113 | 1,142 | 2.11 | 5.5 | October 29, 1887 |
| Lakeside | Buena Vista | 700 | 596 | 0.18 | 0.47 | July 15, 1933 |
| Lakota | Kossuth | 267 | 255 | 0.19 | 0.49 | October 1, 1918 |
| Lambs Grove | Jasper | 174 | 172 | 0.1 | 0.26 | December 29, 1952 |
| Lamoni | Decatur | 1,969 | 2,324 | 3.33 | 8.6 | October 15, 1885 |
| Lamont | Buchanan | 429 | 461 | 0.58 | 1.5 | December 10, 1892 |
| Lanesboro | Carroll | 119 | 121 | 0.74 | 1.9 | April 30, 1903 |
| Lansing | Allamakee | 968 | 999 | 1.08 | 2.8 | July 1, 1867 |
| Larchwood | Lyon | 926 | 866 | 0.99 | 2.6 | January 6, 1892 |
| Larrabee | Cherokee | 123 | 132 | 0.12 | 0.31 | July 25, 1896 |
| Latimer | Franklin | 477 | 507 | 2.4 | 6.2 | April 17, 1901 |
| Laurel | Marshall | 220 | 239 | 0.25 | 0.65 | April 23, 1903 |
| Laurens | Pocahontas | 1,264 | 1,258 | 0.73 | 1.9 | April 30, 1890 |
| Lawler | Chickasaw | 406 | 439 | 0.88 | 2.3 | April 28, 1873 |
| Lawton | Woodbury | 943 | 908 | 0.71 | 1.8 | 1906 |
| Le Claire | Scott | 4,710 | 3,765 | 4.67 | 12.1 | January 13, 1855 |
| Le Grand | Marshall Tama | 905 | 938 | 1.04 | 2.7 | May 9, 1891 |
| Le Mars† | Plymouth | 10,571 | 9,826 | 8.96 | 23.2 | May 25, 1881 |
| Le Roy | Decatur | 11 | 15 | 0.33 | 0.85 | May 6, 1904 |
| Ledyard | Kossuth | 121 | 130 | 0.33 | 0.85 | April 16, 1895 |
| Lehigh | Webster | 395 | 416 | 2.09 | 5.4 | February 10, 1883 |
| Leighton | Mahaska | 158 | 162 | 0.1 | 0.26 | September 21, 1909 |
| Leland | Winnebago | 249 | 289 | 1.33 | 3.4 | February 28, 1895 |
| Lenox | Taylor Adams | 1,339 | 1,407 | 1.98 | 5.1 | July 2, 1875 |
| Leon† | Decatur | 1,822 | 1,977 | 3.17 | 8.2 | May 2, 1867 |
| Lester | Lyon | 296 | 294 | 1.82 | 4.7 | December 26, 1892 |
| Letts | Louisa | 363 | 384 | 0.59 | 1.5 | July 28, 1877 |
| Lewis | Cass | 357 | 433 | 0.5 | 1.3 | May 14, 1874 |
| Libertyville | Jefferson | 274 | 315 | 0.49 | 1.3 | April 15, 1916 |
| Lidderdale | Carroll | 166 | 180 | 2.42 | 6.3 | November 27, 1905 |
| Lime Springs | Howard | 473 | 505 | 1.02 | 2.6 | April 17, 1876 |
| Lincoln | Tama | 121 | 162 | 0.46 | 1.2 | September 10, 1913 |
| Linden | Dallas | 200 | 199 | 0.79 | 2.0 | January 12, 1893 |
| Lineville | Wayne | 195 | 217 | 0.9 | 2.3 | November 6, 1871 |
| Linn Grove | Buena Vista | 163 | 154 | 0.58 | 1.5 | March 4, 1912 |
| Lisbon | Linn | 2,223 | 2,152 | 2.14 | 5.5 | February 10, 1875 |
| Liscomb | Marshall | 291 | 301 | 0.98 | 2.5 | March 23, 1874 |
| Little Rock | Lyon | 439 | 459 | 0.8 | 2.1 | November 26, 1894 |
| Little Sioux | Harrison | 166 | 170 | 0.37 | 0.96 | November 26, 1883 |
| Livermore | Humboldt | 381 | 384 | 0.7 | 1.8 | March 11, 1882 |
| Lockridge | Jefferson | 244 | 268 | 0.74 | 1.9 | June 17, 1913 |
| Logan† | Harrison | 1,397 | 1,534 | 1.0 | 2.6 | April 22, 1876 |
| Lohrville | Calhoun | 381 | 368 | 2.14 | 5.5 | December 14, 1882 |
| Lone Rock | Kossuth | 146 | 146 | 0.12 | 0.31 | August 5, 1915 |
| Lone Tree | Johnson | 1,357 | 1,300 | 1.04 | 2.7 | May 20, 1890 |
| Long Grove | Scott | 838 | 808 | 1.02 | 2.6 | August 1, 1912 |
| Lorimor | Union | 386 | 360 | 0.38 | 0.98 | December 16, 1892 |
| Lost Nation | Clinton | 434 | 446 | 0.64 | 1.7 | June 9, 1903 |
| Lovilia | Monroe | 472 | 538 | 0.5 | 1.3 | April 21, 1933 |
| Low Moor | Clinton | 250 | 288 | 0.46 | 1.2 | February 10, 1897 |
| Lowden | Cedar | 807 | 789 | 1.02 | 2.6 | March 12, 1869 |
| Lu Verne | Kossuth Humboldt | 258 | 261 | 2.26 | 5.9 | July 6, 1887 |
| Luana | Clayton | 301 | 269 | 1.05 | 2.7 | May 29, 1911 |
| Lucas | Lucas | 172 | 216 | 0.97 | 2.5 | March 18, 1887 |
| Luther | Boone | 152 | 122 | 0.77 | 2.0 | December 29, 1903 |
| Luxemburg | Dubuque | 245 | 240 | 0.46 | 1.2 | January 2, 1912 |
| Luzerne | Benton | 112 | 96 | 0.12 | 0.31 | October 24, 1895 |
| Lynnville | Jasper | 380 | 379 | 1.11 | 2.9 | August 9, 1875 |
| Lytton | Sac Calhoun | 282 | 315 | 0.2 | 0.52 | July 21, 1911 |
| Macedonia | Pottawattamie | 267 | 246 | 0.33 | 0.85 | June 21, 1892 |
| Macksburg | Madison | 97 | 113 | 1.99 | 5.2 | December 24, 1876 |
| Madrid | Boone | 2,802 | 2,543 | 1.19 | 3.1 | June 9, 1883 |
| Magnolia | Harrison | 190 | 183 | 0.57 | 1.5 | November 30, 1909 |
| Maharishi Vedic City | Jefferson | 277 | 259 | 3.36 | 8.7 | July 25, 2001 |
| Malcom | Poweshiek | 270 | 287 | 0.61 | 1.6 | April 23, 1872 |
| Mallard | Palo Alto | 257 | 274 | 0.41 | 1.1 | June 25, 1895 |
| Maloy | Ringgold | 22 | 29 | 0.62 | 1.6 | June 18, 1901 |
| Malvern | Mills | 1,046 | 1,142 | 1.19 | 3.1 | February 24, 1872 |
| Manchester† | Delaware | 5,065 | 5,179 | 4.68 | 12.1 | March 19, 1864 |
| Manilla | Crawford | 775 | 776 | 1.03 | 2.7 | October 3, 1887 |
| Manly | Worth | 1,256 | 1,323 | 1.47 | 3.8 | November 19, 1898 |
| Manning | Carroll | 1,455 | 1,500 | 2.49 | 6.4 | February 17, 1882 |
| Manson | Calhoun | 1,709 | 1,690 | 3.18 | 8.2 | May 5, 1877 |
| Mapleton | Monona | 1,165 | 1,224 | 1.6 | 4.1 | May 10, 1870 |
| Maquoketa† | Jackson Clinton | 6,128 | 6,141 | 4.33 | 11.2 | January 27, 1857 |
| Marathon | Buena Vista | 230 | 237 | 0.74 | 1.9 | October 31, 1892 |
| Marble Rock | Floyd | 271 | 307 | 0.83 | 2.1 | February 8, 1881 |
| Marcus | Cherokee | 1,079 | 1,117 | 1.54 | 4.0 | May 15, 1882 |
| Marengo† | Iowa | 2,435 | 2,528 | 2.08 | 5.4 | July 4, 1859 |
| Marion | Linn | 41,535 | 34,768 | 16.05 | 41.6 | August 10, 1865 |
| Marne | Cass | 110 | 120 | 0.57 | 1.5 | May 10, 1892 |
| Marquette | Clayton | 429 | 375 | 1.74 | 4.5 | June 2, 1874 |
| Marshalltown† | Marshall | 27,591 | 27,552 | 19.28 | 49.9 | March 5, 1923 |
| Martelle | Jones | 249 | 255 | 0.34 | 0.88 | April 28, 1899 |
| Martensdale | Warren | 421 | 465 | 0.39 | 1.0 | October 29, 1920 |
| Martinsburg | Keokuk | 110 | 112 | 0.38 | 0.98 | December 30, 1887 |
| Marysville | Marion | 44 | 66 | 0.37 | 0.96 | July 31, 1875 |
| Mason City† | Cerro Gordo | 27,338 | 28,079 | 27.81 | 72.0 | December 21, 1869 |
| Masonville | Delaware | 99 | 127 | 0.33 | 0.85 | June 28, 1901 |
| Massena | Cass | 359 | 355 | 0.69 | 1.8 | January 18, 1887 |
| Matlock | Sioux | 74 | 87 | 0.37 | 0.96 | July 5, 1897 |
| Maurice | Sioux | 265 | 275 | 0.55 | 1.4 | May 23, 1891 |
| Maxwell | Story | 859 | 920 | 1.11 | 2.9 | December 17, 1883 |
| Maynard | Fayette | 476 | 518 | 0.99 | 2.6 | June 9, 1887 |
| Maysville | Scott | 156 | 176 | 0.27 | 0.70 | June 21, 1909 |
| McCallsburg | Story | 353 | 333 | 0.53 | 1.4 | February 25, 1901 |
| McCausland | Scott | 313 | 291 | 0.54 | 1.4 | May 28, 1909 |
| McClelland | Pottawattamie | 146 | 151 | 0.17 | 0.44 | December 14, 1904 |
| McGregor | Clayton | 742 | 871 | 1.3 | 3.4 | March 7, 1859 |
| McIntire | Mitchell | 113 | 122 | 1.01 | 2.6 | July 9, 1894 |
| Mechanicsville | Cedar | 1,020 | 1,146 | 0.83 | 2.1 | November 25, 1867 |
| Mediapolis | Des Moines | 1,688 | 1,560 | 1.2 | 3.1 | June 14, 1875 |
| Melbourne | Marshall | 786 | 830 | 0.57 | 1.5 | October 29, 1895 |
| Melcher-Dallas | Marion | 1,195 | 1,288 | 1.0 | 2.6 | June 26, 1986 |
| Melrose | Monroe | 110 | 112 | 1.01 | 2.6 | March 20, 1882 |
| Melvin | Osceola | 199 | 214 | 0.18 | 0.47 | 1901 |
| Menlo | Guthrie | 345 | 353 | 0.47 | 1.2 | February 2, 1881 |
| Meriden | Cherokee | 161 | 159 | 0.11 | 0.28 | December 24, 1881 |
| Merrill | Plymouth | 717 | 755 | 0.57 | 1.5 | April 24, 1894 |
| Meservey | Cerro Gordo | 222 | 256 | 1.51 | 3.9 | August 24, 1893 |
| Middletown | Des Moines | 363 | 318 | 0.61 | 1.6 | May 11, 1914 |
| Miles | Jackson | 408 | 445 | 1.15 | 3.0 | May 4, 1893 |
| Milford | Dickinson | 3,321 | 2,898 | 2.28 | 5.9 | January 12, 1892 |
| Millersburg | Iowa | 135 | 159 | 0.14 | 0.36 | January 12, 1911 |
| Millerton | Wayne | 36 | 45 | 0.21 | 0.54 | April 26, 1915 |
| Milo | Warren | 778 | 775 | 0.62 | 1.6 | November 4, 1880 |
| Milton | Van Buren | 380 | 443 | 2.51 | 6.5 | May 20, 1878 |
| Minburn | Dallas | 325 | 365 | 0.28 | 0.73 | May 24, 1892 |
| Minden | Pottawattamie | 600 | 599 | 0.42 | 1.1 | October 6, 1880 |
| Mingo | Jasper | 302 | 302 | 0.61 | 1.6 | February 13, 1903 |
| Missouri Valley | Harrison | 2,678 | 2,838 | 3.13 | 8.1 | October 30, 1871 |
| Mitchell | Mitchell | 124 | 138 | 0.54 | 1.4 | May 27, 1879 |
| Mitchellville | Polk Jasper | 2,485 | 2,254 | 2.33 | 6.0 | September 30, 1875 |
| Modale | Harrison | 273 | 283 | 1.05 | 2.7 | April 22, 1882 |
| Mondamin | Harrison | 339 | 402 | 0.45 | 1.2 | December 23, 1881 |
| Monmouth | Jackson | 129 | 153 | 0.56 | 1.5 | July 12, 1894 |
| Monona | Clayton | 1,471 | 1,549 | 1.17 | 3.0 | May 11, 1897 |
| Monroe | Jasper | 1,967 | 1,830 | 1.69 | 4.4 | May 1, 1897 |
| Montezuma† | Poweshiek | 1,442 | 1,462 | 2.48 | 6.4 | February 21, 1868 |
| Monticello | Jones | 4,040 | 3,796 | 6.29 | 16.3 | September 24, 1889 |
| Montour | Tama | 203 | 249 | 0.46 | 1.2 | May 4, 1883 |
| Montrose | Lee | 738 | 898 | 1.12 | 2.9 | 1875 |
| Moorhead | Monona | 199 | 226 | 0.32 | 0.83 | April 9, 1900 |
| Moorland | Webster | 168 | 169 | 1.48 | 3.8 | October 6, 1902 |
| Moravia | Appanoose Monroe | 637 | 665 | 1.12 | 2.9 | September 26, 1881 |
| Morley | Jones | 96 | 115 | 0.09 | 0.23 | January 26, 1925 |
| Morning Sun | Louisa | 752 | 836 | 0.8 | 2.1 | June 3, 1867 |
| Morrison | Grundy | 98 | 94 | 0.1 | 0.26 | April 24, 1884 |
| Moulton | Appanoose | 607 | 605 | 1.01 | 2.6 | February 24, 1869 |
| Mount Auburn | Benton | 162 | 150 | 0.28 | 0.73 | November 19, 1906 |
| Mount Ayr† | Ringgold | 1,623 | 1,691 | 2.67 | 6.9 | June 8, 1875 |
| Mount Pleasant† | Henry | 9,274 | 8,668 | 8.51 | 22.0 | July 15, 1856 |
| Mount Vernon | Linn | 4,527 | 4,506 | 3.49 | 9.0 | July 7, 1869 |
| Moville | Woodbury | 1,687 | 1,618 | 0.89 | 2.3 | August 13, 1889 |
| Murray | Clarke | 684 | 756 | 0.79 | 2.0 | October 21, 1880 |
| Muscatine† | Muscatine | 23,797 | 22,886 | 17.3 | 45 | February 1, 1851 |
| Mystic | Appanoose | 322 | 425 | 2.92 | 7.6 | October 29, 1889 |
| Nashua | Chickasaw Floyd | 1,551 | 1,663 | 2.88 | 7.5 | January 29, 1857 |
| Nemaha | Sac | 66 | 85 | 0.07 | 0.18 | January 27, 1915 |
| Neola | Pottawattamie | 918 | 842 | 0.46 | 1.2 | March 7, 1882 |
| Nevada† | Story | 6,925 | 6,798 | 5.06 | 13.1 | October 4, 1869 |
| New Albin | Allamakee | 432 | 522 | 0.24 | 0.62 | May 20, 1895 |
| New Hampton† | Chickasaw | 3,494 | 3,571 | 3.16 | 8.2 | April 26, 1873 |
| New Hartford | Butler | 570 | 516 | 0.5 | 1.3 | December 7, 1883 |
| New Liberty | Scott | 138 | 137 | 0.1 | 0.26 | June 26, 1909 |
| New London | Henry | 1,910 | 1,897 | 1.01 | 2.6 | October 22, 1860 |
| New Market | Taylor | 385 | 415 | 0.44 | 1.1 | December 9, 1882 |
| New Providence | Hardin | 236 | 228 | 1.01 | 2.6 | January 30, 1893 |
| New Sharon | Mahaska | 1,262 | 1,293 | 0.94 | 2.4 | 1871 |
| New Vienna | Dubuque | 382 | 407 | 0.44 | 1.1 | July 17, 1895 |
| New Virginia | Warren | 498 | 489 | 0.46 | 1.2 | April 27, 1901 |
| Newell | Buena Vista | 906 | 876 | 1.27 | 3.3 | September 30, 1876 |
| Newhall | Benton | 876 | 875 | 0.32 | 0.83 | June 3, 1912 |
| Newton† | Jasper | 15,760 | 15,254 | 11.19 | 29.0 | January 26, 1857 |
| Nichols | Muscatine | 340 | 374 | 0.23 | 0.60 | March 15, 1884 |
| Nodaway | Adams | 74 | 114 | 0.54 | 1.4 | May 28, 1900 |
| Nora Springs | Floyd Cerro Gordo | 1,369 | 1,431 | 2.19 | 5.7 | September 17, 1874 |
| North Buena Vista | Clayton | 109 | 121 | 1.0 | 2.6 | October 25, 1907 |
| North English | Iowa Keokuk | 1,065 | 1,041 | 0.55 | 1.4 | March 13, 1891 |
| North Liberty | Johnson | 20,479 | 13,374 | 7.83 | 20.3 | November 10, 1913 |
| North Washington | Chickasaw | 112 | 117 | 0.2 | 0.52 | April 16, 1904 |
| Northboro | Page | 52 | 58 | 0.26 | 0.67 | October 14, 1902 |
| Northwood† | Worth | 2,072 | 1,931 | 3.76 | 9.7 | June 7, 1875 |
| Norwalk | Warren Polk | 12,799 | 8,945 | 10.74 | 27.8 | June 15, 1901 |
| Norway | Benton | 466 | 545 | 0.45 | 1.2 | December 20, 1894 |
| Numa | Appanoose | 68 | 92 | 0.44 | 1.1 | November 9, 1909 |
| Oakland | Pottawattamie | 1,524 | 1,527 | 1.42 | 3.7 | March 14, 1882 |
| Oakland Acres | Jasper | 176 | 156 | 0.28 | 0.73 | January 22, 1875 |
| Oakville | Louisa | 200 | 173 | 0.42 | 1.1 | October 27, 1902 |
| Ocheyedan | Osceola | 439 | 490 | 1.16 | 3.0 | February 20, 1892 |
| Odebolt | Sac | 994 | 1,013 | 1.05 | 2.7 | June 17, 1878 |
| Oelwein | Fayette | 5,920 | 6,415 | 4.81 | 12.5 | November 29, 1887 |
| Ogden | Boone | 2,007 | 2,044 | 1.37 | 3.5 | April 29, 1878 |
| Okoboji | Dickinson | 768 | 807 | 1.85 | 4.8 | July 28, 1922 |
| Olds | Henry | 192 | 229 | 0.34 | 0.88 | December 12, 1900 |
| Olin | Jones | 651 | 698 | 1.03 | 2.7 | November 14, 1879 |
| Ollie | Keokuk | 201 | 215 | 0.99 | 2.6 | March 1, 1892 |
| Onawa† | Monona | 2,906 | 2,998 | 5.19 | 13.4 | March 22, 1859 |
| Onslow | Jones | 201 | 197 | 0.22 | 0.57 | June 20, 1888 |
| Orange City† | Sioux | 6,267 | 6,004 | 3.94 | 10.2 | February 29, 1884 |
| Orchard | Mitchell | 68 | 71 | 0.09 | 0.23 | July 10, 1913 |
| Orient | Adair | 368 | 408 | 0.45 | 1.2 | March 21, 1882 |
| Orleans | Dickinson | 521 | 608 | 1.08 | 2.8 | July 3, 1895 |
| Osage† | Mitchell | 3,627 | 3,619 | 2.24 | 5.8 | April 14, 1871 |
| Osceola† | Clarke | 5,415 | 4,929 | 6.48 | 16.8 | December 24, 1866 |
| Oskaloosa† | Mahaska | 11,558 | 11,463 | 7.43 | 19.2 | February 4, 1875 |
| Ossian | Winneshiek | 802 | 845 | 1.11 | 2.9 | February 10, 1876 |
| Osterdock | Clayton | 43 | 59 | 0.46 | 1.2 | April 16, 1904 |
| Otho | Webster | 429 | 542 | 0.46 | 1.2 | June 3, 1954 |
| Oto | Woodbury | 72 | 108 | 0.26 | 0.67 | July 10, 1888 |
| Ottosen | Humboldt | 40 | 55 | 0.57 | 1.5 | July 16, 1909 |
| Ottumwa† | Wapello | 25,529 | 25,023 | 15.86 | 41.1 | February 2, 1888 |
| Owasa | Hardin | 34 | 43 | 0.56 | 1.5 | March 18, 1920 |
| Oxford | Johnson | 722 | 807 | 0.91 | 2.4 | April 8, 1881 |
| Oxford Junction | Jones | 424 | 496 | 0.69 | 1.8 | January 15, 1884 |
| Oyens | Plymouth | 92 | 103 | 0.09 | 0.23 | January 29, 1909 |
| Pacific Junction | Mills | 96 | 471 | 0.76 | 2.0 | January 11, 1882 |
| Packwood | Jefferson | 183 | 204 | 0.76 | 2.0 | May 7, 1894 |
| Palmer | Pocahontas | 138 | 165 | 0.42 | 1.1 | May 21, 1901 |
| Palo | Linn | 1,407 | 1,026 | 1.43 | 3.7 | April 25, 1905 |
| Panama | Shelby | 235 | 221 | 0.29 | 0.75 | May 17, 1886 |
| Panora | Guthrie | 1,091 | 1,124 | 1.8 | 4.7 | July 6, 1872 |
| Panorama Park | Scott | 139 | 129 | 0.05 | 0.13 | July 7, 1953 |
| Parkersburg | Butler | 2,015 | 1,870 | 1.42 | 3.7 | December 7, 1874 |
| Parnell | Iowa | 194 | 193 | 0.17 | 0.44 | March 24, 1891 |
| Paton | Greene | 221 | 236 | 0.56 | 1.5 | February 20, 1884 |
| Patterson | Madison | 176 | 130 | 0.2 | 0.52 | December 7, 1877 |
| Paullina | O'Brien | 982 | 1,056 | 0.85 | 2.2 | October 30, 1883 |
| Pella | Marion | 10,464 | 10,352 | 8.73 | 22.6 | April 10, 1868 |
| Peosta | Dubuque | 1,908 | 1,377 | 1.97 | 5.1 | June 16, 1933 |
| Perry | Dallas | 7,836 | 7,702 | 4.17 | 10.8 | May 18, 1875 |
| Persia | Harrison | 297 | 319 | 0.47 | 1.2 | April 30, 1891 |
| Peterson | Clay | 322 | 334 | 0.31 | 0.80 | November 12, 1886 |
| Pierson | Woodbury | 337 | 366 | 0.62 | 1.6 | November 27, 1891 |
| Pilot Mound | Boone | 163 | 173 | 0.98 | 2.5 | June 23, 1897 |
| Pisgah | Harrison | 249 | 251 | 1.01 | 2.6 | July 2, 1904 |
| Plainfield | Bremer | 393 | 436 | 0.33 | 0.85 | October 17, 1895 |
| Plano | Appanoose | 59 | 70 | 0.56 | 1.5 | October 5, 1916 |
| Pleasant Hill | Polk | 10,147 | 8,785 | 9.15 | 23.7 | May 12, 1956 |
| Pleasant Plain | Jefferson | 84 | 93 | 1.02 | 2.6 | April 12, 1900 |
| Pleasanton | Decatur | 32 | 49 | 0.35 | 0.91 | February 21, 1884 |
| Pleasantville | Marion | 1,676 | 1,694 | 2.53 | 6.6 | June 11, 1872 |
| Plover | Pocahontas | 50 | 77 | 0.54 | 1.4 | October 13, 1916 |
| Plymouth | Cerro Gordo | 375 | 382 | 0.44 | 1.1 | October 18, 1900 |
| Pocahontas† | Pocahontas | 1,867 | 1,789 | 2.02 | 5.2 | May 16, 1892 |
| Polk City | Polk | 5,543 | 3,418 | 4.32 | 11.2 | March 13, 1875 |
| Pomeroy | Calhoun | 526 | 662 | 2.04 | 5.3 | April 22, 1880 |
| Popejoy | Franklin | 77 | 79 | 0.74 | 1.9 | July 24, 1908 |
| Portsmouth | Shelby | 182 | 195 | 0.28 | 0.73 | 1883 |
| Postville | Allamakee Clayton | 2,503 | 2,227 | 2.11 | 5.5 | March 17, 1873 |
| Prairie City | Jasper | 1,700 | 1,680 | 1.2 | 3.1 | August 7, 1874 |
| Prairieburg | Linn | 160 | 178 | 0.46 | 1.2 | March 30, 1905 |
| Prescott | Adams | 191 | 257 | 0.4 | 1.0 | November 26, 1890 |
| Preston | Jackson | 949 | 1,012 | 0.96 | 2.5 | November 11, 1890 |
| Primghar† | O'Brien | 896 | 909 | 1.38 | 3.6 | February 15, 1888 |
| Princeton | Scott | 923 | 886 | 2.56 | 6.6 | January 29, 1857 |
| Promise City | Wayne | 88 | 111 | 0.19 | 0.49 | August 23, 1901 |
| Protivin | Howard Chickasaw | 269 | 283 | 0.48 | 1.2 | August 1, 1894 |
| Pulaski | Davis | 264 | 260 | 0.51 | 1.3 | May 3, 1893 |
| Quasqueton | Buchanan | 570 | 554 | 1.13 | 2.9 | July 1, 1902 |
| Quimby | Cherokee | 249 | 319 | 0.41 | 1.1 | June 7, 1906 |
| Radcliffe | Hardin | 555 | 545 | 1.0 | 2.6 | July 8, 1891 |
| Rake | Winnebago | 186 | 225 | 0.81 | 2.1 | January 20, 1908 |
| Ralston | Carroll Greene | 81 | 79 | 1.99 | 5.2 | October 31, 1903 |
| Randalia | Fayette | 50 | 68 | 0.22 | 0.57 | April 30, 1896 |
| Randall | Hamilton | 154 | 173 | 0.41 | 1.1 | July 15, 1940 |
| Randolph | Fremont | 189 | 168 | 0.32 | 0.83 | July 6, 1881 |
| Rathbun | Appanoose | 43 | 89 | 0.22 | 0.57 | March 1, 1894 |
| Raymond | Black Hawk | 759 | 788 | 1.63 | 4.2 | May 31, 1956 |
| Readlyn | Bremer | 845 | 808 | 0.33 | 0.85 | February 1, 1905 |
| Reasnor | Jasper | 152 | 152 | 0.55 | 1.4 | June 15, 1912 |
| Red Oak† | Montgomery | 5,596 | 5,742 | 3.95 | 10.2 | June 28, 1869 |
| Redding | Ringgold | 63 | 82 | 0.99 | 2.6 | April 10, 1882 |
| Redfield | Dallas | 731 | 835 | 1.4 | 3.6 | March 21, 1881 |
| Reinbeck | Grundy | 1,662 | 1,664 | 1.82 | 4.7 | May 13, 1878 |
| Rembrandt | Buena Vista | 209 | 203 | 0.2 | 0.52 | August 12, 1901 |
| Remsen | Plymouth | 1,678 | 1,663 | 1.27 | 3.3 | 1889 |
| Renwick | Humboldt | 234 | 242 | 1.0 | 2.6 | October 17, 1891 |
| Rhodes | Marshall | 271 | 305 | 1.01 | 2.6 | May 12, 1882 |
| Riceville | Mitchell Howard | 806 | 785 | 1.1 | 2.8 | November 17, 1964 |
| Richland | Keokuk | 542 | 584 | 0.77 | 2.0 | December 31, 1868 |
| Rickardsville | Dubuque | 202 | 182 | 0.9 | 2.3 | November 17, 1964 |
| Ricketts | Crawford | 109 | 145 | 0.26 | 0.67 | March 19, 1902 |
| Ridgeway | Winneshiek | 275 | 315 | 1.02 | 2.6 | March 15, 1894 |
| Rinard | Calhoun | 38 | 52 | 1.0 | 2.6 | December 29, 1914 |
| Ringsted | Emmet | 365 | 422 | 1.08 | 2.8 | March 29, 1900 |
| Rippey | Greene | 220 | 292 | 0.84 | 2.2 | April 14, 1896 |
| Riverdale | Scott | 379 | 405 | 1.84 | 4.8 | December 27, 1950 |
| Riverside | Washington | 1,060 | 993 | 1.72 | 4.5 | March 22, 1882 |
| Riverton | Fremont | 245 | 304 | 0.59 | 1.5 | June 22, 1876 |
| Robins | Linn | 3,353 | 3,142 | 5.83 | 15.1 | May 3, 1910 |
| Rock Falls | Cerro Gordo | 150 | 155 | 0.21 | 0.54 | July 17, 1882 |
| Rock Rapids† | Lyon | 2,611 | 2,549 | 3.96 | 10.3 | April 8, 1885 |
| Rock Valley | Sioux | 4,059 | 3,354 | 3.22 | 8.3 | November 26, 1886 |
| Rockford | Floyd | 758 | 860 | 0.63 | 1.6 | March 19, 1878 |
| Rockwell | Cerro Gordo | 1,071 | 1,039 | 2.98 | 7.7 | July 9, 1881 |
| Rockwell City† | Calhoun | 2,240 | 1,709 | 4.21 | 10.9 | May 2, 1882 |
| Rodman | Palo Alto | 31 | 45 | 0.17 | 0.44 | June 17, 1899 |
| Rodney | Monona | 45 | 60 | 0.16 | 0.41 | February 2, 1892 |
| Roland | Story | 1,362 | 1,284 | 1.08 | 2.8 | December 29, 1891 |
| Rolfe | Pocahontas | 509 | 584 | 1.05 | 2.7 | January 4, 1884 |
| Rome | Henry | 114 | 117 | 0.13 | 0.34 | January 1, 1869 |
| Rose Hill | Mahaska | 157 | 168 | 0.14 | 0.36 | August 22, 1876 |
| Rossie | Clay | 49 | 70 | 0.15 | 0.39 | August 30, 1922 |
| Rowan | Wright | 123 | 158 | 0.49 | 1.3 | December 21, 1901 |
| Rowley | Buchanan | 270 | 264 | 0.36 | 0.93 | April 20, 1920 |
| Royal | Clay | 379 | 446 | 0.3 | 0.78 | August 30, 1910 |
| Rudd | Floyd | 358 | 369 | 0.87 | 2.3 | February 7, 1900 |
| Runnells | Polk | 457 | 507 | 0.43 | 1.1 | May 21, 1903 |
| Russell | Lucas | 472 | 554 | 1.04 | 2.7 | April 25, 1887 |
| Ruthven | Palo Alto | 725 | 737 | 0.42 | 1.1 | March 12, 1885 |
| Rutland | Humboldt | 113 | 126 | 0.9 | 2.3 | July 6, 1907 |
| Ryan | Delaware | 350 | 361 | 0.43 | 1.1 | May 6, 1901 |
| Sabula | Jackson | 506 | 576 | 0.4 | 1.0 | September 1864 |
| Sac City† | Sac | 2,063 | 2,185 | 4.86 | 12.6 | December 22, 1874 |
| Sageville | Dubuque | 95 | 122 | 0.69 | 1.8 | June 2, 1933 |
| Salem | Henry | 394 | 383 | 0.61 | 1.6 | January 24, 1855 |
| Salix | Woodbury | 295 | 363 | 1.52 | 3.9 | April 19, 1893 |
| Sanborn | O'Brien | 1,392 | 1,404 | 1.9 | 4.9 | March 15, 1880 |
| Sandyville | Warren | 58 | 51 | 0.51 | 1.3 | 1905 |
| Scarville | Winnebago | 74 | 72 | 0.08 | 0.21 | April 11, 1904 |
| Schaller | Sac | 729 | 772 | 1.26 | 3.3 | May 25, 1883 |
| Schleswig | Crawford | 830 | 882 | 1.3 | 3.4 | February 15, 1900 |
| Scranton | Greene | 511 | 557 | 1.88 | 4.9 | May 18, 1880 |
| Searsboro | Poweshiek | 129 | 148 | 0.45 | 1.2 | August 3, 1876 |
| Sergeant Bluff | Woodbury | 5,015 | 4,227 | 2.11 | 5.5 | May 2, 1904 |
| Seymour | Wayne | 634 | 701 | 2.35 | 6.1 | February 28, 1874 |
| Shambaugh | Page | 159 | 191 | 0.36 | 0.93 | April 21, 1903 |
| Shannon City | Union Ringgold | 73 | 71 | 0.41 | 1.1 | December 26, 1892 |
| Sharpsburg | Taylor | 72 | 89 | 0.36 | 0.93 | April 25, 1905 |
| Sheffield | Franklin | 1,130 | 1,172 | 5.55 | 14.4 | April 8, 1876 |
| Shelby | Shelby Pottawattamie | 727 | 641 | 1.74 | 4.5 | November 24, 1877 |
| Sheldahl | Story Polk Boone | 297 | 319 | 0.84 | 2.2 | January 18, 1882 |
| Sheldon | O'Brien Sioux | 5,512 | 5,188 | 4.5 | 12 | April 24, 1876 |
| Shell Rock | Butler | 1,268 | 1,296 | 1.56 | 4.0 | June 1, 1875 |
| Shellsburg | Benton | 961 | 983 | 0.77 | 2.0 | February 19, 1874 |
| Shenandoah | Page Fremont | 4,925 | 5,150 | 3.75 | 9.7 | June 20, 1871 |
| Sherrill | Dubuque | 189 | 177 | 0.13 | 0.34 | June 29, 1933 |
| Shueyville | Johnson | 731 | 577 | 1.79 | 4.6 | March 8, 1968 |
| Sibley† | Osceola | 2,860 | 2,798 | 1.68 | 4.4 | April 5, 1876 |
| Sidney† | Fremont | 1,070 | 1,138 | 1.38 | 3.6 | May 7, 1870 |
| Sigourney† | Keokuk | 2,004 | 2,059 | 2.18 | 5.6 | October 4, 1858 |
| Silver City | Mills | 245 | 245 | 0.22 | 0.57 | June 23, 1883 |
| Sioux Center | Sioux | 8,229 | 7,048 | 6.31 | 16.3 | October 1, 1891 |
| Sioux City† | Woodbury Plymouth | 85,797 | 82,684 | 57.35 | 148.5 | January 16, 1857 |
| Sioux Rapids | Buena Vista | 748 | 775 | 0.82 | 2.1 | April 6, 1882 |
| Slater | Story | 1,543 | 1,489 | 1.26 | 3.3 | May 5, 1890 |
| Sloan | Woodbury | 1,042 | 973 | 0.62 | 1.6 | October 16, 1883 |
| Smithland | Woodbury | 181 | 224 | 0.37 | 0.96 | May 6, 1889 |
| Soldier | Monona | 184 | 174 | 0.29 | 0.75 | April 1, 1901 |
| Solon | Johnson | 3,018 | 2,037 | 1.39 | 3.6 | April 28, 1877 |
| Somers | Calhoun | 128 | 113 | 0.35 | 0.91 | April 26, 1902 |
| South English | Keokuk | 202 | 212 | 0.3 | 0.78 | July 13, 1892 |
| Spencer† | Clay | 11,325 | 11,233 | 11.01 | 28.5 | July 13, 1892 |
| Spillville | Winneshiek | 385 | 367 | 0.42 | 1.1 | December 5, 1894 |
| Spirit Lake† | Dickinson | 5,439 | 4,840 | 4.63 | 12.0 | October 14, 1878 |
| Spragueville | Jackson | 92 | 81 | 0.67 | 1.7 | May 18, 1912 |
| Spring Hill | Warren | 68 | 63 | 0.12 | 0.31 | November 22, 1881 |
| Springbrook | Jackson | 143 | 144 | 0.6 | 1.6 | March 2, 1897 |
| Springville | Linn | 1,154 | 1,074 | 0.72 | 1.9 | January 27, 1882 |
| St. Ansgar | Mitchell | 1,160 | 1,107 | 1.03 | 2.7 | February 9, 1876 |
| St. Anthony | Marshall | 76 | 102 | 0.56 | 1.5 | November 6, 1897 |
| St. Charles | Madison | 640 | 653 | 0.54 | 1.4 | March 15, 1876 |
| St. Donatus | Jackson | 120 | 135 | 0.37 | 0.96 | June 8, 1964 |
| St. Lucas | Fayette | 167 | 143 | 0.27 | 0.70 | March 6, 1900 |
| St. Marys | Warren | 108 | 127 | 0.14 | 0.36 | April 5, 1923 |
| St. Olaf | Clayton | 106 | 108 | 0.24 | 0.62 | May 31, 1900 |
| St. Paul | Lee | 109 | 129 | 0.38 | 0.98 | April 1, 1895 |
| Stacyville | Mitchell | 458 | 494 | 0.51 | 1.3 | March 30, 1900 |
| Stanhope | Hamilton | 364 | 422 | 0.97 | 2.5 | December 14, 1897 |
| Stanley | Buchanan Fayette | 81 | 125 | 0.24 | 0.62 | March 23, 1914 |
| Stanton | Montgomery | 678 | 689 | 0.92 | 2.4 | March 12, 1883 |
| Stanwood | Cedar | 637 | 684 | 0.71 | 1.8 | March 29, 1887 |
| State Center | Marshall | 1,391 | 1,468 | 0.98 | 2.5 | August 26, 1867 |
| Steamboat Rock | Hardin | 264 | 310 | 0.54 | 1.4 | October 7, 1875 |
| Stockport | Van Buren | 272 | 296 | 1.03 | 2.7 | January 9, 1903 |
| Stockton | Muscatine | 176 | 197 | 0.11 | 0.28 | February 11, 1902 |
| Storm Lake† | Buena Vista | 11,269 | 10,600 | 4.08 | 10.6 | February 28, 1873 |
| Story City | Story | 3,352 | 3,431 | 2.8 | 7.3 | December 12, 1881 |
| Stout | Grundy | 191 | 224 | 0.3 | 0.78 | June 25, 1909 |
| Stratford | Hamilton Webster | 707 | 743 | 1.91 | 4.9 | September 27, 1883 |
| Strawberry Point | Clayton | 1,155 | 1,279 | 2.11 | 5.5 | December 19, 1887 |
| Struble | Plymouth | 67 | 78 | 0.16 | 0.41 | August 17, 1895 |
| Stuart | Guthrie Adair | 1,782 | 1,648 | 2.58 | 6.7 | February 6, 1887 |
| Sully | Jasper | 881 | 821 | 0.58 | 1.5 | February 23, 1901 |
| Sumner | Bremer Fayette | 2,021 | 2,028 | 2.52 | 6.5 | June 1, 1894 |
| Superior | Dickinson | 132 | 130 | 0.41 | 1.1 | December 11, 1895 |
| Sutherland | O'Brien | 629 | 649 | 0.87 | 2.3 | October 29, 1883 |
| Swaledale | Cerro Gordo | 144 | 165 | 0.24 | 0.62 | March 31, 1892 |
| Swan | Marion | 76 | 72 | 0.64 | 1.7 | June 26, 1884 |
| Swea City | Kossuth | 566 | 536 | 0.74 | 1.9 | May 7, 1895 |
| Swisher | Johnson | 914 | 879 | 0.82 | 2.1 | July 25, 1933 |
| Tabor | Fremont Mills | 928 | 1,040 | 1.29 | 3.3 | October 5, 1868 |
| Tama | Tama | 3,130 | 2,877 | 3.26 | 8.4 | March 16, 1887 |
| Templeton | Carroll | 352 | 362 | 0.43 | 1.1 | September 28, 1883 |
| Tennant | Shelby | 78 | 68 | 0.71 | 1.8 | April 23, 1915 |
| Terril | Dickinson | 334 | 367 | 0.55 | 1.4 | December 30, 1899 |
| Thayer | Union | 51 | 59 | 0.09 | 0.23 | May 11, 1894 |
| Thompson | Winnebago | 495 | 502 | 0.88 | 2.3 | February 24, 1894 |
| Thor | Humboldt | 181 | 186 | 1.0 | 2.6 | April 23, 1900 |
| Thornburg | Keokuk | 45 | 67 | 0.2 | 0.52 | September 25, 1883 |
| Thornton | Cerro Gordo | 400 | 422 | 1.25 | 3.2 | August 22, 1892 |
| Thurman | Fremont | 167 | 229 | 0.56 | 1.5 | February 10, 1879 |
| Tiffin | Johnson | 4,512 | 1,947 | 4.13 | 10.7 | December 27, 1906 |
| Tingley | Ringgold | 136 | 184 | 0.68 | 1.8 | June 17, 1884 |
| Tipton† | Cedar | 3,149 | 3,221 | 2.09 | 5.4 | January 27, 1857 |
| Titonka | Kossuth | 511 | 476 | 0.28 | 0.73 | February 1, 1900 |
| Toledo† | Tama | 2,369 | 2,258 | 2.3 | 6.0 | January 1, 1866 |
| Toronto | Clinton | 102 | 124 | 0.19 | 0.49 | July 26, 1909 |
| Traer | Tama | 1,583 | 1,703 | 1.18 | 3.1 | January 18, 1875 |
| Treynor | Pottawattamie | 1,032 | 919 | 0.58 | 1.5 | August 24, 1904 |
| Tripoli | Bremer | 1,191 | 1,313 | 1.41 | 3.7 | October 16, 1894 |
| Truesdale | Buena Vista | 69 | 81 | 0.14 | 0.36 | May 15, 1917 |
| Truro | Madison | 509 | 485 | 0.97 | 2.5 | February 24, 1902 |
| Turin | Monona | 72 | 68 | 0.09 | 0.23 | April 6, 1900 |
| Udell | Appanoose | 28 | 47 | 0.32 | 0.83 | April 9, 1903 |
| Underwood | Pottawattamie | 954 | 917 | 0.46 | 1.2 | January 28, 1902 |
| Union | Hardin | 399 | 397 | 0.55 | 1.4 | October 26, 1874 |
| Unionville | Appanoose | 75 | 102 | 0.74 | 1.9 | July 1, 1922 |
| University Heights | Johnson | 1,228 | 1,051 | 0.27 | 0.70 | August 13, 1935 |
| University Park | Mahaska | 487 | 487 | 0.77 | 2.0 | April 13, 1909 |
| Urbana | Benton | 1,554 | 1,458 | 2.2 | 5.7 | November 4, 1892 |
| Urbandale | Polk Dallas | 45,580 | 39,463 | 21.92 | 56.8 | May 3, 1917 |
| Ute | Monona | 338 | 374 | 0.39 | 1.0 | November 4, 1892 |
| Vail | Crawford | 396 | 436 | 0.57 | 1.5 | October 1, 1875 |
| Valeria | Jasper | 39 | 57 | 0.05 | 0.13 | December 9, 1912 |
| Van Horne | Benton | 774 | 682 | 0.63 | 1.6 | June 13, 1883 |
| Van Meter | Dallas | 1,484 | 1,016 | 1.28 | 3.3 | December 29, 1877 |
| Van Wert | Decatur | 178 | 230 | 0.33 | 0.85 | March 4, 1891 |
| Varina | Pocahontas | 68 | 71 | 0.27 | 0.70 | March 29, 1901 |
| Ventura | Cerro Gordo | 711 | 717 | 1.77 | 4.6 | May 28, 1960 |
| Victor | Iowa Poweshiek | 875 | 893 | 0.48 | 1.2 | November 30, 1868 |
| Villisca | Montgomery | 1,132 | 1,252 | 1.9 | 4.9 | September 3, 1869 |
| Vincent | Webster | 130 | 174 | 0.25 | 0.65 | May 27, 1898 |
| Vining | Tama | 54 | 50 | 0.57 | 1.5 | May 26, 1913 |
| Vinton† | Benton | 4,938 | 5,257 | 4.74 | 12.3 | July 17, 1869 |
| Volga | Clayton | 203 | 208 | 0.78 | 2.0 | October 16, 1895 |
| Wadena | Fayette | 209 | 262 | 0.74 | 1.9 | July 11, 1895 |
| Wahpeton | Dickinson | 345 | 341 | 1.21 | 3.1 | June 24, 1933 |
| Walcott | Scott Muscatine | 1,551 | 1,629 | 3.47 | 9.0 | July 10, 1894 |
| Walford | Benton Linn | 1,366 | 1,463 | 1.11 | 2.9 | April 15, 1954 |
| Walker | Linn | 688 | 791 | 0.76 | 2.0 | June 13, 1891 |
| Wall Lake | Sac | 755 | 819 | 1.23 | 3.2 | December 7, 1880 |
| Wallingford | Emmet | 165 | 197 | 0.97 | 2.5 | November 4, 1913 |
| Walnut | Pottawattamie | 747 | 785 | 2.15 | 5.6 | October 2, 1877 |
| Wapello† | Louisa | 2,084 | 2,067 | 1.29 | 3.3 | July 15, 1856 |
| Washington† | Washington | 7,352 | 7,266 | 4.92 | 12.7 | June 6, 1864 |
| Washta | Cherokee | 209 | 248 | 1.04 | 2.7 | June 6, 1890 |
| Waterloo† | Black Hawk | 67,314 | 68,406 | 61.39 | 159.0 | July 1, 1868 |
| Waterville | Allamakee | 109 | 144 | 0.43 | 1.1 | June 18, 1912 |
| Waucoma | Fayette | 229 | 257 | 0.43 | 1.1 | June 5, 1883 |
| Waukee | Dallas | 23,940 | 13,790 | 12.97 | 33.6 | December 23, 1878 |
| Waukon† | Allamakee | 3,827 | 3,897 | 2.82 | 7.3 | April 4, 1883 |
| Waverly† | Bremer | 10,394 | 9,874 | 11.01 | 28.5 | March 2, 1859 |
| Wayland | Henry | 964 | 966 | 1.01 | 2.6 | February 5, 1890 |
| Webb | Clay | 138 | 141 | 0.5 | 1.3 | April 9, 1901 |
| Webster | Keokuk | 94 | 88 | 0.32 | 0.83 | April 13, 1909 |
| Webster City† | Hamilton | 7,825 | 8,070 | 8.86 | 22.9 | September 16, 1874 |
| Weldon | Decatur | 136 | 125 | 0.18 | 0.47 | October 20, 1902 |
| Wellman | Washington | 1,524 | 1,408 | 1.14 | 3.0 | October 28, 1885 |
| Wellsburg | Grundy | 720 | 707 | 1.09 | 2.8 | March 28, 1896 |
| Welton | Clinton | 121 | 165 | 0.27 | 0.70 | April 25, 1908 |
| Wesley | Kossuth | 391 | 390 | 0.58 | 1.5 | April 13, 1892 |
| West Bend | Palo Alto Kossuth | 791 | 785 | 0.89 | 2.3 | February 27, 1884 |
| West Branch | Cedar Johnson | 2,509 | 2,322 | 3.19 | 8.3 | April 12, 1875 |
| West Burlington | Des Moines | 3,197 | 2,968 | 4.95 | 12.8 | December 15, 1883 |
| West Chester | Washington | 144 | 146 | 0.25 | 0.65 | April 17, 1899 |
| West Des Moines | Polk Dallas Warren | 68,723 | 56,609 | 38.59 | 99.9 | November 16, 1893 |
| West Liberty | Muscatine | 3,858 | 3,736 | 1.73 | 4.5 | July 1, 1867 |
| West Okoboji | Dickinson | 308 | 289 | 1.28 | 3.3 | December 17, 1924 |
| West Point | Lee | 921 | 966 | 0.61 | 1.6 | March 25, 1858 |
| West Union† | Fayette | 2,490 | 2,486 | 2.78 | 7.2 | December 9, 1879 |
| Westfield | Plymouth | 123 | 132 | 0.13 | 0.34 | May 27, 1903 |
| Westgate | Fayette | 192 | 211 | 0.36 | 0.93 | July 6, 1896 |
| Westphalia | Shelby | 126 | 127 | 0.1 | 0.26 | November 7, 1919 |
| Westside | Crawford | 285 | 299 | 1.47 | 3.8 | 1871 |
| Westwood | Henry | 101 | 112 | 0.15 | 0.39 | January 14, 1982 |
| What Cheer | Keokuk | 607 | 646 | 1.22 | 3.2 | February 27, 1880 |
| Wheatland | Clinton | 775 | 764 | 0.6 | 1.6 | July 13, 1869 |
| Whiting | Monona | 745 | 762 | 1.0 | 2.6 | May 15, 1883 |
| Whittemore | Kossuth | 497 | 504 | 0.42 | 1.1 | November 19, 1891 |
| Whitten | Hardin | 100 | 149 | 0.54 | 1.4 | March 13, 1896 |
| Willey | Carroll | 73 | 88 | 0.25 | 0.65 | February 29, 1912 |
| Williams | Hamilton | 307 | 344 | 0.87 | 2.3 | September 13, 1883 |
| Williamsburg | Iowa | 3,346 | 3,068 | 3.74 | 9.7 | December 3, 1884 |
| Williamson | Lucas | 120 | 152 | 0.32 | 0.83 | June 14, 1922 |
| Wilton | Muscatine Cedar | 2,924 | 2,802 | 1.95 | 5.1 | February 12, 1878 |
| Windsor Heights | Polk | 5,252 | 4,860 | 1.41 | 3.7 | July 19, 1941 |
| Winfield | Henry | 1,033 | 1,134 | 1.05 | 2.7 | March 27, 1882 |
| Winterset† | Madison | 5,353 | 5,190 | 4.58 | 11.9 | January 16, 1857 |
| Winthrop | Buchanan | 823 | 850 | 0.84 | 2.2 | June 7, 1886 |
| Wiota | Cass | 91 | 116 | 0.32 | 0.83 | January 16, 1884 |
| Woden | Hancock | 188 | 229 | 0.42 | 1.1 | January 7, 1904 |
| Woodbine | Harrison | 1,625 | 1,459 | 1.28 | 3.3 | November 9, 1877 |
| Woodburn | Clarke | 146 | 202 | 0.64 | 1.7 | February 12, 1878 |
| Woodward | Dallas Boone | 1,346 | 1,024 | 2.46 | 6.4 | October 13, 1883 |
| Woolstock | Wright | 144 | 168 | 1.06 | 2.7 | April 19, 1895 |
| Worthington | Dubuque | 382 | 401 | 0.38 | 0.98 | January 10, 1893 |
| Wyoming | Jones | 523 | 515 | 0.51 | 1.3 | October 21, 1873 |
| Yale | Guthrie | 267 | 246 | 0.27 | 0.70 | November 27, 1901 |
| Yetter | Calhoun | 19 | 34 | 0.13 | 0.34 | January 11, 1904 |
| Yorktown | Page | 60 | 85 | 0.27 | 0.70 | March 25, 1899 |
| Zearing | Story | 528 | 554 | 0.75 | 1.9 | February 6, 1883 |
| Zwingle | Dubuque Jackson | 84 | 91 | 0.16 | 0.41 | December 17, 1900 |

## Former city

| Name | County | Population (2010) | Area (2010) | Area (2010) | Unincorporation date | Coordinates |
| Name | County | Population (2010) | sq mi | km$^2$ | Unincorporation date | Coordinates |
| Millville | Clayton | 30 | 0.07 | 0.2 | July 2014 | 42°42′15″N 91°4′34″W﻿ / ﻿42.70417°N 91.07611°W﻿ / 42.70417; -91.07611 |