# Montgomery County, Ohio

Montgomery County is in the southwestern part of the U.S. state of Ohio. At the 2020 census, the population was 537,309, making it the fifth-most populous county in Ohio. The county seat is Dayton. The county was named in honor of Richard Montgomery, an American Revolutionary War general, who was killed in 1775 while attempting to capture Quebec City, Canada. Montgomery County is part of the Dayton, Ohio, Metropolitan Statistical Area.

## Geography

The county has a total area of 464 square miles (1,200 km$^2$), of which 462 square miles (1,200 km$^2$) is land and 2.8 square miles (7.3 km$^2$) (0.6%) is water.

### Adjacent counties

* Miami County (north)
* Clark County (northeast)
* Greene County (east)
* Warren County (south)
* Butler County (southwest)
* Preble County (west)
* Darke County (northwest)

### Major highways

* Interstate 70
* Interstate 70 Alternate
* Interstate 75
* Interstate 675
* U.S. Route 25
* U.S. Route 35
* U.S. Route 40
* State Route 4
* State Route 48
* State Route 49
* State Route 123
* State Route 201
* State Route 202
* State Route 235
* State Route 444
* State Route 725
* State Route 741
* State Route 835

### National protected area

* Dayton Aviation Heritage National Historical Park (part)

## Demographics
### 2000 census

As of the census of 2000, there were 559,062 people, 229,229 households, and 146,935 families living in the county. The population density was 1,211 people per square mile (468 people/km$^2$). There were 248,443 housing units at an average density of 538 per square mile (208/km$^2$). The racial makeup of the county was 76.57% White, 19.86% Black or African American, 0.23% Native American, 1.31% Asian, 0.04% Pacific Islander, 0.49% from other races, and 1.51% from two or more races. 1.27% of the population were Hispanic or Latino of any race.
There were 229,229 households, out of which 29.60% had children under the age of 18 living with them, 46.30% were married couples living together, 13.80% had a female householder with no husband present, and 35.90% were non-families. 30.40% of all households were made up of individuals, and 10.10% had someone living alone who was 65 years of age or older. The average household size was 2.37, and the average family size was 2.96.
In the county, the population was spread out, with 24.70% under the age of 18, 9.70% from 18 to 24, 29.00% from 25 to 44, 22.90% from 45 to 64, and 13.70% who were 65 years of age or older. The median age was 36 years. For every 100 females, there were 92.30 males. For every 100 females age 18 and over, there were 88.60 males.
The median income for a household in the county was $40,156, and the median income for a family was $50,071. Males had a median income of $38,710 versus $27,297 for females. The per capita income for the county was $21,743. About 8.30% of families and 11.30% of the population were below the poverty line, including 15.60% of those under age 18 and 8.20% of those age 65 or over.

### 2010 census

As of the 2010 census, there were 535,153 people, 223,943 households, and 138,060 families living in the county. The population density was 1,159.5 inhabitants per square mile (447.7/km$^2$). There were 254,775 housing units at an average density of 552.0 per square mile (213.1/km$^2$). The racial makeup of the county was 73.9% white, 20.9% black or African American, 1.7% Asian, 0.2% American Indian, 0.8% from other races, and 2.4% from two or more races. Those of Hispanic or Latino origin made up 2.3% of the population. In terms of ancestry, 24.9% were German, 12.8% were Irish, 9.7% were American, and 8.8% were English.
Of the 223,943 households, 29.7% had children under the age of 18 living with them, 41.6% were married couples living together, 15.3% had a female householder with no husband present, 38.4% were non-families, and 32.2% of all households were made up of individuals. The average household size was 2.33, and the average family size was 2.94. The median age was 39.2 years.
The median income for a household in the county was $43,965, and the median income for a family was $56,559. Males had a median income of $45,680 versus $34,991 for females. The per capita income for the county was $24,828. About 11.7% of families and 15.7% of the population were below the poverty line, including 22.7% of those under age 18 and 8.7% of those aged 65 or over.

## Politics

Montgomery County has been a slightly Democratic-leaning swing county since the Civil War. After voting consistently Democratic in presidential elections from 1992 to 2012, Republican Donald Trump narrowly defeated Democrat Hillary Clinton in the county in 2016. The last Democrat to win the county by double digits was Lyndon B. Johnson in 1964, while the last Republican to do so was George H. W. Bush in 1988.
United States presidential election results for Montgomery County, Ohio :
| Year | Republican | Republican | Democratic | Democratic | Third party(ies) | Third party(ies) |
| Year | No. | % | No. | % | No. | % |
| 2024 | 125,566 | 48.95% | 126,767 | 49.41% | 4,211 | 1.64% |
| 2020 | 129,034 | 47.94% | 135,064 | 50.18% | 5,066 | 1.88% |
| 2016 | 123,909 | 47.68% | 122,016 | 46.95% | 13,951 | 5.37% |
| 2012 | 124,841 | 46.81% | 137,139 | 51.42% | 4,727 | 1.77% |
| 2008 | 128,679 | 46.12% | 145,997 | 52.32% | 4,355 | 1.56% |
| 2004 | 138,371 | 48.97% | 142,997 | 50.60% | 1,216 | 0.43% |
| 2000 | 109,792 | 47.53% | 114,597 | 49.61% | 6,598 | 2.86% |
| 1996 | 95,391 | 41.30% | 115,469 | 50.00% | 20,097 | 8.70% |
| 1992 | 104,751 | 40.02% | 108,017 | 41.27% | 48,952 | 18.70% |
| 1988 | 131,596 | 57.48% | 95,737 | 41.82% | 1,610 | 0.70% |
| 1984 | 137,053 | 58.97% | 94,016 | 40.45% | 1,333 | 0.57% |
| 1980 | 101,443 | 45.49% | 105,110 | 47.13% | 16,456 | 7.38% |
| 1976 | 100,223 | 47.40% | 106,468 | 50.35% | 4,745 | 2.24% |
| 1972 | 120,998 | 58.02% | 82,231 | 39.43% | 5,323 | 2.55% |
| 1968 | 84,766 | 40.93% | 96,082 | 46.39% | 26,272 | 12.68% |
| 1964 | 71,979 | 36.24% | 126,633 | 63.76% | 0 | 0.00% |
| 1960 | 109,602 | 52.71% | 98,325 | 47.29% | 0 | 0.00% |
| 1956 | 107,278 | 58.45% | 76,270 | 41.55% | 0 | 0.00% |
| 1952 | 91,905 | 53.51% | 79,860 | 46.49% | 0 | 0.00% |
| 1948 | 60,048 | 43.48% | 76,879 | 55.66% | 1,187 | 0.86% |
| 1944 | 63,336 | 43.47% | 82,367 | 56.53% | 0 | 0.00% |
| 1940 | 57,866 | 40.20% | 86,084 | 59.80% | 0 | 0.00% |
| 1936 | 44,742 | 35.02% | 76,430 | 59.81% | 6,606 | 5.17% |
| 1932 | 49,267 | 46.60% | 51,270 | 48.50% | 5,180 | 4.90% |
| 1928 | 71,279 | 64.53% | 38,517 | 34.87% | 665 | 0.60% |
| 1924 | 50,845 | 62.61% | 21,860 | 26.92% | 8,505 | 10.47% |
| 1920 | 46,493 | 51.67% | 38,433 | 42.72% | 5,049 | 5.61% |
| 1916 | 19,683 | 41.99% | 24,339 | 51.92% | 2,853 | 6.09% |
| 1912 | 10,341 | 26.15% | 15,544 | 39.31% | 13,653 | 34.53% |
| 1908 | 20,069 | 47.09% | 20,566 | 48.26% | 1,980 | 4.65% |
| 1904 | 22,144 | 58.70% | 13,933 | 36.93% | 1,648 | 4.37% |
| 1900 | 19,606 | 53.55% | 16,236 | 44.34% | 772 | 2.11% |
| 1896 | 18,333 | 53.56% | 15,540 | 45.40% | 359 | 1.05% |
| 1892 | 13,197 | 46.88% | 14,067 | 49.97% | 888 | 3.15% |
| 1888 | 12,491 | 47.89% | 13,142 | 50.38% | 451 | 1.73% |
| 1884 | 11,524 | 50.12% | 11,326 | 49.26% | 143 | 0.62% |
| 1880 | 9,726 | 48.28% | 10,332 | 51.28% | 89 | 0.44% |
| 1876 | 7,921 | 46.82% | 8,971 | 53.02% | 27 | 0.16% |
| 1872 | 6,998 | 49.17% | 7,183 | 50.47% | 50 | 0.35% |
| 1868 | 6,502 | 51.54% | 6,113 | 48.46% | 0 | 0.00% |
| 1864 | 5,554 | 51.21% | 5,291 | 48.79% | 0 | 0.00% |
| 1860 | 4,974 | 50.07% | 4,710 | 47.41% | 251 | 2.53% |
| 1856 | 4,038 | 46.34% | 4,285 | 49.17% | 391 | 4.49% |

## Government
### Montgomery County Officials

| Office | Officeholder | Party |
| Montgomery County Commissioner | Judy Dodge | Democratic |
| Montgomery County Commissioner | Mary McDonald | Republican |
| Montgomery County Commissioner | Carolyn Rice | Democratic |
| Auditor | Karl Keith | Democratic |
| Clerk of Courts | Mike Foley | Republican |
| Coroner | Kent Harshbarger | Republican |
| Engineer | Andrew Shahan | Democratic |
| Prosecutor | Mathias Heck Jr. | Democratic |
| Recorder | Lori Kennedy | Republican |
| Sheriff | Rob Streck | Republican |
| Treasurer | John McManus | Republican |

### Ohio House of Representatives

| District | Representative | Party |
| 36 | Andrea White | Republican |
| 37 | J. Thomas Young | Republican |
| 38 | Desiree Tims | Democratic |
| 39 | Phil Plummer | Republican |
| 40 | Rodney Creech | Republican |

### Ohio State Senate

| District | Senator | Party |
| 5 | Stephen Huffman | Republican |
| 6 | Willis Blackshear | Democratic |

### United States House of Representatives

| District | Representative | Party |
| 10 | Mike Turner | Republican |

### United States Senate

| Senator | Party |
| Bernie Moreno | Republican |
| Jon Husted | Republican |

## Education
### Post-secondary institutions
#### Public

* Air Force Institute of Technology (actually located in Wright-Patterson AFB, Ohio).
* Sinclair Community College
* Wright State University (actually located in neighboring Greene County, Ohio, but uses a Dayton address).

#### Private

* University of Dayton
* Kettering College of Medical Arts
* The Miami Valley School

### Public schools

The following public school districts are located partially or entirely in Montgomery County:
* Local School Districts
** Brookville Local Schools
*** Brookville High School, Brookville (the Blue Devils)
** Carlisle Local School District
*** Carlisle High School, Carlisle (the Indians)
** Jefferson Township Local Schools
*** Jefferson Township High School, Dayton (the Broncos)
** Mad River Local School District
** New Lebanon Local Schools
*** Dixie High School, Dixie (the Greyhounds)
** Northmont City School District
** Northridge Local School District
*** Northridge High School (the Polar Bears)
** Mad River Local Schools
*** Walter E. Stebbins High School, Riverside (the Indians)
** Preble Shawnee Local School District
** Tri-County North Local School District
** Valley View Local Schools
*** Valley View High School, Germantown (the Spartans)
* City School Districts
** Beavercreek City School District
** Centerville City Schools
*** Centerville High School, Centerville (the Elks)
** Dayton Public Schools
*** Belmont High School for Computer Technology/Engineering, Dayton (the Bison)
*** Thurgood Marshall High School for the Arts, Dayton (the Cougars)
*** Dayton Early College Academy, Dayton
*** Dunbar High School for Professional Studies, Dayton (the Wolverines)
*** Meadowdale High School for Cultural Studies/International Baccalaureate, Dayton (the Lions)
*** Stivers School for the Arts, Dayton (Tigers)
** Fairborn City School District
** Huber Heights City Schools
*** Wayne High School, Huber Heights (the Warriors)
** Kettering City School District
*** Fairmont High School, Kettering (the Firebirds)
**** (merger of the former Fairmont East and Fairmont West high schools (the East Falcons and the West Dragons)
** Miamisburg City Schools
*** Miamisburg High School, Miamisburg (the Vikings)
** Northmont City Schools
*** Northmont High School, Clayton (the Thunderbolts)
** Oakwood City School District
*** Oakwood High School, Oakwood (the Lumberjacks)
** Springboro Community City School District
** Trotwood-Madison City Schools
*** Trotwood-Madison High School, Trotwood (the Rams)
** Vandalia Butler City Schools
*** Butler High School, Vandalia (the Aviators)
** West Carrollton Schools
*** West Carrollton Senior High School, West Carrollton (the Pirates)
There is also a public independent (not a part of any school district) STEM school:
* The Dayton Regional STEM School

### Private schools

The following private high schools are located in Montgomery County:
* Archbishop Alter High School, Kettering (the Knights) (Roman Catholic)
* Carroll High School, Dayton (the Patriots) (Roman Catholic)
* Chaminade Julienne High School, Dayton (Eagles) (Roman Catholic/Marianist)
* Dayton Christian High School, Dayton (the Warriors) (nondenominational Christian)
* Dominion Academy, Dayton (the Sabers) (Christ the King Anglican Church)
* Miami Valley School, Dayton (the Rams) (nonsectarian)
* Salem Christian Academy, Clayton
* Spring Valley Academy, Centerville (Seventh-day Adventist)

## Communities
### Cities

* Brookville
* Carlisle (mostly in Warren County)
* Centerville (partly in Greene County)
* Clayton
* Dayton (county seat)
* Englewood
* Germantown
* Huber Heights (partly in Miami County)
* Kettering (partly in Greene County)
* Miamisburg
* Moraine
* Oakwood
* Riverside
* Springboro (mostly in Warren County)
* Trotwood
* Union (mostly in Montgomery County)
* Vandalia
* West Carrollton

### Villages

* Farmersville
* New Lebanon
* Phillipsburg
* Verona (mostly in Preble County)

### Townships

* Butler
* Clay
* German
* Harrison
* Jackson
* Jefferson
* Miami
* Perry
* Washington

### Defunct townships

* Dayton
* Mad River (remnant merged with the Village of Riverside in 1994)
* Madison (remnant merged with the Village of Trotwood in 1996)
* Randolph (remnant merged with the Village of Clayton in 1998)
* Van Buren (partitioned between the municipalities of Kettering and Moraine in 1952–1953)
* Wayne (incorporated as Huber Heights in 1981)

### Census-designated place

* Drexel
* Fort McKinley
* Shiloh

### Unincorporated communities

* Airhill
* Amity
* Arlington
* Bachman
* Chautauqua
* Dodson
* Harries
* Kinsey
* Liberty
* Little York
* Miami Villa
* Morgan Place
* New Chicago
* Northridge
* Pyrmont
* Spanker
* Taylorsburg
* Woodbourne-Hyde Park