Geography of Indiana - wikipedia Geography of Indiana Further information : List of counties in Indiana Indiana map of Köppen climate classification. Regions of Indiana The geography of Indiana comprises the physical features of the land and relative location of U.S. State of Indiana. Indiana is in the north - central United States and borders on Lake Michigan. Surrounding states are Michigan to the north and northeast, Illinois to the west, Kentucky to the south, and Ohio to the east. The entire southern boundary is the Ohio River. Contents 1 Statistics 2 Overview 3 Regions 3.1 Northern Indiana 3.1. 1 Michiana 3.1. 2 Maumee Valley 3.2 Central Indiana 3.3 Southern Indiana 4 Physiography 5 Geology 5.1 Coal 5.2 Rivers 6 Climate statistics for selected cities 7 See also 8 Notes 9 References Statistics Total area is 36,291 square miles ( 93,990 km ), ranked 38th in size of the 50 states. Lake Michigan is the largest waterbody wholly or partially within the state borders. Near Bethel in Wayne County is the highest point in the state at 1,275 feet ( 389 m ) above sea level. The Ohio River at southwest of Mt. Vernon is the lowest point, at 320 feet ( 98 m ) above sea level. Overview Indiana is bordered on the north by Lake Michigan and the state of Michigan ; on the east by Ohio ; on the south by Kentucky, with which it shares the Ohio River as a border ; and on the west by Illinois. Indiana is one of the Great Lakes states. The northern boundary of the states of Ohio, Indiana, and Illinois was originally defined to be a latitudinal line drawn through the southernmost tip of Lake Michigan. Since such a line did not provide Indiana with usable frontage on the lake, its northern border was shifted ten miles ( 16 km ) north when it was granted statehood in 1816. The 475 mile ( 764 km ) long Wabash River bisects the state from northeast to southwest before flowing south, mostly along the Indiana - Illinois border. The river has given Indiana a few theme songs, such as On the Banks of the Wabash, The Wabash Cannonball and Back Home Again, In Indiana. The Wabash is the longest free - flowing river east of the Mississippi River, traversing 400 miles ( 640 km ) from the Huntington dam to the Ohio River. The White River, a tributary of the Wabash, zigzags through central Indiana. There are 24 Indiana state parks, nine man - made reservoirs, and hundreds of lakes in the state. Areas under the control and protection of the National Park Service or the United States Forest Service include : George Rogers Clark National Historical Park in Vincennes Indiana Dunes National Lakeshore near Michigan City Lincoln Boyhood National Memorial in Lincoln City Hoosier National Forest in Bedford Regions The state of Indiana can be divided into several distinct regions. Northern Indiana Main articles : Northern Indiana, Northwest Indiana, Michiana, and Rust Belt Highlighted are the counties in Northern Indiana. Northern Indiana consists of 26 counties in the northern third of the state. The landscape is characterized physically by very flat to rolling terrain ranging from 600 to 1,000 feet ( 180 to 300 m ) above sea level and is similar to central Indiana except for the presence of higher and hillier terminal moraines and many glacial kettle lakes in some areas. Sand dunes and sand ridges also exist along the Lake Michigan shoreline ( some reaching near 200 feet in height ) and inland around the Kankakee River Basin. The Eastern Continental Divide goes through Northern Indiana following the top of the Valparaiso Moraine part of the way. Besides some urban areas, much of Northern Indiana is farmland. Heavy industry is as much a part of the economy in the eastern two thirds of Northern Indiana as agriculture, and, as a result, the region tends to be associated with the Rust Belt. Northern Indiana as a whole is also the most ethnically diverse region in Indiana. The northwest corner of the state is part of the Chicago metropolitan area and has nearly one million residents. Gary, and the cities and towns that make up the northern half of Lake, Porter, and La Porte Counties bordering on Lake Michigan, are effectively commuter suburbs of Chicago. Porter and Lake counties are commonly referred to as `` The Calumet Region ''. The name comes from the fact that the Grand Calumet and Little Calumet rivers run through the area. These counties are in the Central Time Zone, the same as Chicago. NICTD owns and operates the South Shore Line, a commuter rail line that runs electric - powered trains between South Bend and Chicago. Sand dunes and heavy industry share the shoreline of Lake Michigan in northern Indiana. Along the shoreline of Lake Michigan in Northern Indiana one can find many parks between the industrial areas. The Indiana Dunes National Lakeshore and the Indiana Dunes State Park are two natural landmarks of the area. Northwest Indiana is marked with swell and swale topography as it retreats South from Lake Michigan ( which are remnants of the beaches of ancient Lake Michigan ) and is one of the marshiest parts of the state. The ecology changes dramatically between swells, or on opposite sides of the same swell. Plants and animals adapted to marshes are generally found in the swales, while forests or even prickly pear cactus and six - lined racerunners are found in the dryer swells. Most of north central Indiana is rolling to flat farmland dotted with small cities and towns, such as North Manchester. Much of Northern Indiana is considered part of Amish Country and holds the nation 's second largest population of such people. The Kankakee River, which winds through northern Indiana, serves somewhat as a demarcating line between suburban northwest Indiana and the rest of the state. Before it was drained and developed for agriculture, the Kankakee Marsh was one of the largest freshwater marshes in the country. South of the Kankakee is a large area of prairie, the eastern edge of the Grand Prairie that covers Iowa and Illinois. The prairie chicken and American bison were common in Indiana 's pioneer era, but are now extinct as wild species within the state. The South Bend metropolitan area, in north central Indiana, is the center of commerce in the region better known as Michiana. Other cities located within the area include Elkhart, Mishawaka, Goshen, and Warsaw. Fort Wayne, the state 's second largest city, is located in the northeastern part of the state where it serves the state as a transportation hub. Other cities located within the area include Huntington and Marion. East of Fort Wayne is an area of extremely flat land that, before development, was the western-most reach of the Great Black Swamp. Northeastern Indiana is home to a number of lakes, many of which are kettle lakes, which were caused by the glaciers that covered Indiana thousands of years ago and Glacial Lake Maumee. Some of these lakes include Lake James in Pokagon State Park, Lake Maxinkuckee, Lake Wawasee and Lake Tippecanoe. Lake Wawasee is the largest natural lake in Indiana, while Lake Tippecanoe is the deepest lake, reaching depths of over 120 feet ( 37 m ). Both lakes are located in Kosciusko County. Chain O ' Lakes State Park, located in Noble County, contains 11 lakes, 8 of which are connected by natural channels. Michiana Main article : Michiana The center third of this region is known as the Indiana section of Michiana. South Bend is the cultural and economic center of the Michiana region. Maumee valley The eastern third of this region centers around the Fort Wayne area and the Maumee River basin. Central Indiana See also : Indianapolis metropolitan area Highlighted are the counties in Central Indiana. Central Indiana comprises the 33 counties in the middle third of the state. However, many Hoosiers consider Central Indiana as the Indianapolis metropolitan area. The region 's dominant city by far is Indianapolis. Other prominent cities include Lafayette, Kokomo, Anderson, Muncie, and Terre Haute. Central Indiana is the most populous region of Indiana. The primary economic engines of Central Indiana are education and research, agriculture and manufacturing, and as a result, some of the larger cities in the region are dealing with Rust Belt issues similar to Northern Indiana. Major universities include Butler University, Purdue University, Indiana University Purdue University Indianapolis, Ball State University, Indiana Wesleyan University, and Indiana State University. Physically, the land in Central Indiana is characterized primarily by low, gently rolling hills and shallow valleys. Some counties of the region, like Howard County, are more flat in nature, while others, such as Morgan County are more rugged and hilly, while Tippecanoe County, trisected by the Wabash River, Tippecanoe River, and Wildcat Creek, has perhaps the most diverse physiography of the region. Elevation ranges from 600 to 1,000 feet ( 180 to 300 metres ) ( and more ) above sea level. Forests and farmland line Central Indiana 's gently rolling plains and river valleys. The highest point in Indiana is Hoosier Hill, at 1,257 feet ( 383 m ) above sea level in northern Wayne County. The state capital and largest city, Indianapolis, is situated in the central portion of the state. It is intersected by numerous Interstates, U.S. highways, and railways giving the state its motto as `` The Crossroads of America ''. Other cities located within the area include Anderson, Carmel, Kokomo, Lafayette, Richmond, and Terre Haute. Rural areas in the central portion of the state are typically composed of a patchwork of fields and forested areas. The geography of Central Indiana consists of gently rolling hills and sandstone ravines carved out by the retreating glaciers. Many of these ravines can be found in west - central Indiana, specifically along Sugar Creek in Turkey Run State Park and Shades State Park. Southern Indiana Main article : Southern Indiana See also : Southwestern Indiana and Louisville metropolitan area Highlighted are the counties of Southern Indiana. Evansville, the third largest city in Indiana, is located in the southwestern corner of the state. It is located in a tri-state area that includes Illinois, Indiana, and Kentucky. The south - central cities of Clarksville, Jeffersonville, and New Albany are part of the Louisville metropolitan area. Bloomington, the home of Indiana University 's main campus, and Columbus, a small industrial city, are located in the northern part of this region. Vincennes, founded by French traders in 1732 and the oldest settlement in the state, is located on the Wabash River as served as the first capital of the Indiana Territory. Vincennes is also home of the Pantheon Theatre. Indiana was settled from its southern periphery northward ; many more of its oldest settlements, including its first capital, Corydon, are in southern Indiana. Until 1950, the United States Census found the center of population to lie in southern Indiana. Southern Indiana is a mixture of farmland, forest and very hilly areas, especially near Louisville and in the south central lime hills areas, stretching from the Ohio River to as far north as Greencastle, to the wide, flat valleys along the Wabash and Ohio rivers. The Hoosier National Forest is a 200,000 - acre ( 810 km ) nature preserve in south central Indiana. Southern Indiana 's topography is more varied than that in the north and generally contains more hills and geographic variation than the northern portion, such as the `` Knobs, '' a series of 1,000 ft ( 300 m ) hills that run parallel to the Ohio River in south - central Indiana. The largely flat and flood - prone bottomlands of Indiana, where the Wabash, White, and Ohio Rivers converge, hosts numerous plant and animal species normally found in the Lower Mississippi and Gulf Coast region of the United States. Brown County is well known for its hills covered with colorful autumn foliage, the former home of T.C. Steele, and Nashville, the county seat and shopping destination. Harrison and Crawford Counties boast three of the state 's most popular commercial caves at Wyandotte, Marengo, and Squire Boone Caverns. The limestone geology of Southern Indiana has created numerous caves and one of the largest limestone quarry regions in the United States. Many of Indiana 's official buildings, such as the Indiana Statehouse, the downtown monuments, the Indiana University School of Law in Indianapolis, many buildings at Indiana University Bloomington, and the Indiana Government Center, are all examples of Indiana architecture made with Indiana limestone. Indiana limestone has also been used in many other famous structures in the United States, such as the Empire State Building, the Pentagon, and the Washington National Cathedral. In addition, 35 of the 50 state capitols are made of Indiana limestone. Physiography Further information : List of ecoregions in Indiana Indiana is broken up into three main physical regions : The Great Lakes Plain in the northern third of the state, the Tipton Till Plain in the central third, and the Southern Hills and Lowlands region in the southern third. Geology Two - thirds of Indiana is covered with glacial till, from a few feet to hundreds of feet thick. The visible geology of the State is therefore mainly Quaternary, with rocks buried deeply. The southern third of the state is unglaciated and the bedrock becomes visible. The Cincinnati Arch and the Kankakee Arch are the predominate geologic features which control the underlying bedrock. The oldest bedrock is Ordovician, forming an arch across the state from the southeastern corner near Cincinnati north and westward to the northwestern corner near Chicago. These layers of shale and limestone are exposed at the surface only in the southern reaches. Parallel to this line on north and south edges is a narrow band of Silurian age bedrock. These are primarily limestone and dolomite. The next gand of rocks are Devonian in age and pass under Lafayette, Indianapolis and New Albany, across the Ohio River from Louisville. Greater erosion and thinner layers of glacial till have created surface exposures along river vallies. The last band of bedrock is from the Carboniferous age and covers nearly a third of the states southwestern area. There the states ' coal measures ' are exposed and major surface mining activities have built the local economies. A narrow belt of Mississippian age limestone, shall, and sandstone occurs west and southwards of Bloomington and had become known for its production of Indiana Limestone an important building material. Coal Indiana 's ' Coal Measures ' are in the southwest corner of the state, where the bedrock is of the Pennsylvanian era. Rivers Main article : Watersheds of Indiana The Wabash River is the longest river in Indiana and cuts across the state from east to west. The Wabash and its main tributaries, the Salamonie River, Mississinewa River, Eel River, Tippecanoe River, White River, Vermilion River, and Embarras River drain Central Indiana The Iroquois and Kankakee Rivers begin in Indiana and flow westward into Illinois before reaching the Mississippi River. The St. Joseph River flows from the state of Michigan through the northern counties at South Bend before returning to Michigan and ending at Lake Michigan. The Maumee River in the northeast is formed by the St. Mary 's River and the St. Joseph River, which join in Fort Wayne before flowing into the state of Ohio to end at Lake Erie. The Ohio River forms the southern boundary of the State, draining the lower two tiers of counties. Climate statistics for selected cities Climate data for Evansville Regional Airport, Indiana ( 1981 -- 2010 normals, extremes 1897 − present ) Month Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Year Record high ° F ( ° C ) 76 ( 24 ) 79 ( 26 ) 87 ( 31 ) 91 ( 33 ) 98 ( 37 ) 107 ( 42 ) 111 ( 44 ) 105 ( 41 ) 104 ( 40 ) 94 ( 34 ) 86 ( 30 ) 77 ( 25 ) 111 ( 44 ) Mean maximum ° F ( ° C ) 63.5 ( 17.5 ) 68.9 ( 20.5 ) 78.0 ( 25.6 ) 83.9 ( 28.8 ) 88.8 ( 31.6 ) 94.3 ( 34.6 ) 96.1 ( 35.6 ) 95.9 ( 35.5 ) 92.6 ( 33.7 ) 85.4 ( 29.7 ) 75.2 ( 24 ) 64.1 ( 17.8 ) 97.7 ( 36.5 ) Average high ° F ( ° C ) 41.0 ( 5 ) 46.0 ( 7.8 ) 56.7 ( 13.7 ) 67.7 ( 19.8 ) 76.9 ( 24.9 ) 85.6 ( 29.8 ) 88.5 ( 31.4 ) 88.0 ( 31.1 ) 81.3 ( 27.4 ) 69.8 ( 21 ) 56.5 ( 13.6 ) 44.1 ( 6.7 ) 66.8 ( 19.3 ) Average low ° F ( ° C ) 24.0 ( − 4.4 ) 27.2 ( − 2.7 ) 35.3 ( 1.8 ) 44.6 ( 7 ) 54.5 ( 12.5 ) 63.9 ( 17.7 ) 67.5 ( 19.7 ) 65.4 ( 18.6 ) 56.8 ( 13.8 ) 45.5 ( 7.5 ) 36.4 ( 2.4 ) 27.1 ( − 2.7 ) 45.7 ( 7.6 ) Mean minimum ° F ( ° C ) 3.7 ( − 15.7 ) 9.0 ( − 12.8 ) 19.6 ( − 6.9 ) 29.0 ( − 1.7 ) 40.5 ( 4.7 ) 50.9 ( 10.5 ) 57.4 ( 14.1 ) 55.4 ( 13 ) 42.0 ( 5.6 ) 30.4 ( − 0.9 ) 22.2 ( − 5.4 ) 7.7 ( − 13.5 ) − 1.5 ( − 18.6 ) Record low ° F ( ° C ) − 21 ( − 29 ) − 23 ( − 31 ) − 9 ( − 23 ) 23 ( − 5 ) 28 ( − 2 ) 41 ( 5 ) 47 ( 8 ) 43 ( 6 ) 31 ( − 1 ) 21 ( − 6 ) − 3 ( − 19 ) − 15 ( − 26 ) − 23 ( − 31 ) Average precipitation inches ( mm ) 3.10 ( 78.7 ) 3.17 ( 80.5 ) 4.24 ( 107.7 ) 4.37 ( 111 ) 5.36 ( 136.1 ) 3.78 ( 96 ) 3.92 ( 99.6 ) 2.98 ( 75.7 ) 3.05 ( 77.5 ) 3.25 ( 82.6 ) 4.33 ( 110 ) 3.76 ( 95.5 ) 45.31 ( 1,150.9 ) Average snowfall inches ( cm ) 3.4 ( 8.6 ) 3.8 ( 9.7 ) 1.0 ( 2.5 ) 0.1 ( 0.3 ) 0 ( 0 ) 0 ( 0 ) 0 ( 0 ) 0 ( 0 ) 0 ( 0 ) 0.2 ( 0.5 ) 0.1 ( 0.3 ) 3.2 ( 8.1 ) 11.8 ( 30 ) Average precipitation days ( ≥ 0.01 in ) 9.8 8.9 10.6 11.7 12.5 9.9 9.0 6.9 7.4 8.3 9.7 10.8 115.5 Average snowy days ( ≥ 0.1 in ) 3.5 2.7 1.0 0.2 0 0 0 0 0 0.1 0.2 2.7 10.4 Average relative humidity ( % ) 71.6 71.0 68.4 64.7 67.7 67.5 70.9 72.8 73.4 69.4 71.2 74.2 70.2 Mean monthly sunshine hours 143.9 149.1 201.9 232.5 283.2 317.8 321.5 304.5 250.4 223.1 145.2 128.3 2,701.4 Percent possible sunshine 47 49 54 59 64 72 71 72 67 64 48 43 61 Source : NOAA ( relative humidity and sun 1961 − 1990 ) Climate data for Indianapolis ( Indianapolis International Airport ), 1981 -- 2010 normals, extremes 1871 -- present Month Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Year Record high ° F ( ° C ) 71 ( 22 ) 76 ( 24 ) 85 ( 29 ) 90 ( 32 ) 96 ( 36 ) 104 ( 40 ) 106 ( 41 ) 103 ( 39 ) 100 ( 38 ) 91 ( 33 ) 81 ( 27 ) 74 ( 23 ) 106 ( 41 ) Mean maximum ° F ( ° C ) 58.3 ( 14.6 ) 63.3 ( 17.4 ) 75.3 ( 24.1 ) 81.4 ( 27.4 ) 86.2 ( 30.1 ) 91.9 ( 33.3 ) 93.6 ( 34.2 ) 92.5 ( 33.6 ) 89.8 ( 32.1 ) 82.1 ( 27.8 ) 71.3 ( 21.8 ) 59.8 ( 15.4 ) 94.8 ( 34.9 ) Average high ° F ( ° C ) 35.6 ( 2 ) 40.2 ( 4.6 ) 51.7 ( 10.9 ) 63.4 ( 17.4 ) 72.8 ( 22.7 ) 81.9 ( 27.7 ) 85.0 ( 29.4 ) 84.0 ( 28.9 ) 77.6 ( 25.3 ) 65.3 ( 18.5 ) 52.2 ( 11.2 ) 38.9 ( 3.8 ) 62.4 ( 16.9 ) Average low ° F ( ° C ) 20.5 ( − 6.4 ) 23.9 ( − 4.5 ) 32.8 ( 0.4 ) 42.7 ( 5.9 ) 52.6 ( 11.4 ) 62.1 ( 16.7 ) 65.8 ( 18.8 ) 64.4 ( 18 ) 56.2 ( 13.4 ) 44.7 ( 7.1 ) 35.1 ( 1.7 ) 24.4 ( − 4.2 ) 43.8 ( 6.6 ) Mean minimum ° F ( ° C ) − 2.5 ( − 19.2 ) 3.4 ( − 15.9 ) 14.9 ( − 9.5 ) 26.6 ( − 3 ) 37.7 ( 3.2 ) 48.2 ( 9 ) 55.0 ( 12.8 ) 53.8 ( 12.1 ) 40.6 ( 4.8 ) 29.6 ( − 1.3 ) 20.0 ( − 6.7 ) 3.3 ( − 15.9 ) − 7.8 ( − 22.1 ) Record low ° F ( ° C ) − 27 ( − 33 ) − 21 ( − 29 ) − 7 ( − 22 ) 18 ( − 8 ) 28 ( − 2 ) 37 ( 3 ) 46 ( 8 ) 41 ( 5 ) 30 ( − 1 ) 20 ( − 7 ) − 5 ( − 21 ) − 23 ( − 31 ) − 27 ( − 33 ) Average precipitation inches ( mm ) 2.66 ( 67.6 ) 2.32 ( 58.9 ) 3.56 ( 90.4 ) 3.81 ( 96.8 ) 5.05 ( 128.3 ) 4.25 ( 108 ) 4.55 ( 115.6 ) 3.13 ( 79.5 ) 3.12 ( 79.2 ) 3.12 ( 79.2 ) 3.70 ( 94 ) 3.17 ( 80.5 ) 42.44 ( 1,078 ) Average snowfall inches ( cm ) 8.6 ( 21.8 ) 6.5 ( 16.5 ) 2.6 ( 6.6 ) 0.2 ( 0.5 ) trace 0 ( 0 ) 0 ( 0 ) 0 ( 0 ) 0 ( 0 ) 0.4 ( 1 ) 0.7 ( 1.8 ) 6.9 ( 17.5 ) 25.9 ( 65.8 ) Average precipitation days ( ≥ 0.01 in ) 12.1 10.0 11.9 12.0 13.1 11.1 10.5 8.5 8.1 8.6 10.8 12.5 129.2 Average snowy days ( ≥ 0.1 in ) 7.5 5.4 2.5 0.4 0 0 0 0 0 0.2 6.3 23.5 Average relative humidity ( % ) 75.0 73.6 69.9 65.6 67.1 68.4 72.8 75.4 74.4 71.6 75.5 78.0 72.3 Mean monthly sunshine hours 132.1 145.7 178.3 214.8 264.7 287.2 295.2 273.7 232.6 196.6 117.1 102.4 2,440.4 Percent possible sunshine 44 49 48 54 59 64 65 64 62 57 39 35 55 Source : NOAA ( relative humidity and sun 1961 -- 1990 ) See also Indiana portal Indiana Midwestern United States Notes Jump up ^ Snowfall and snow depth records only date to 1 January 1948. Jump up ^ Mean monthly maxima and minima ( i.e. the expected highest and lowest temperature readings at any point during the year or given month ) calculated based on data at said location from 1981 to 2010. Jump up ^ Official records for Indianapolis kept at downtown from February 1871 to December 1942, and at Indianapolis Int'l since January 1943. For more information, see Threadex References ^ Jump up to : Tour Book Guide, Illinois & Indiana ; AAA Publishing, Heathrow, Florida ; 2012 Jump up ^ Meinig, D.W. ( 1993 ). The Shaping of America : A Geographical Perspective on 500 Years of History, Volume 2 : Continental America, 1800 -- 1867. New Haven : Yale University Press. p. 436. ISBN 0 - 300 - 05658 - 3. Jump up ^ Ozick, Cynthia ( November 9, 1986 ). `` MIRACLE ON GRUB STREET ; Stockholm ''. The New York Times. access - date = requires url = ( help ) Jump up ^ Fantel, Hans ( October 14, 1984 ). `` SOUND ; CD 'S MAKE THEIR MARK ON THE WABASH VALLEY ''. The New York Times. access - date = requires url = ( help ) Jump up ^ `` Indiana ''. National Park Service. Retrieved 2008 - 07 - 15. Jump up ^ `` Hoosier National Forest ''. United States Forest Service. Retrieved 2008 - 07 - 15. Jump up ^ `` Northwest Indiana Population Data ''. Retrieved 2007 - 03 - 20. Jump up ^ `` Our History ''. Northern Indiana Commuter Transportation District. Archived from the original on 2006 - 09 - 06. Retrieved 2006 - 10 - 19. Jump up ^ Jackson, 211 Jump up ^ Hudson, John C. ( May 1, 2001 ). `` Chicago : Patterns of the metropolis ''. Indiana Business Magazine. access - date = requires url = ( help ) Jump up ^ Jackson, 190 Jump up ^ Jackson, p. 189 Jump up ^ Jackson, p. 201 Jump up ^ Verespej, Michael A. ( April 3, 2000 ). `` The atlas of U.S. manufacturing ''. access - date = requires url = ( help ) Jump up ^ Jackson, 177 Jump up ^ `` Lawrence County Limestone History ''. Lawrence County, Indiana. Archived from the original on 2007 - 10 - 12. Retrieved 2007 - 09 - 11. Jump up ^ Kankakee Arch in Illinois ; George E. Ekblaw ; Circular No. 40. ; State of Illinois ; State Geological Survey, Urbana, Illinois ; 1938 Jump up ^ http://igs.indiana.edu/images/bedrock Jump up ^ 1922 Handbook of Indiana geology ; W.N. Logan, S.S. Vishner, E.R. Cumings, W.M. Tucker ; C.A. Malott, & J.R. Reeves ; Department of Conservation, State of Indiana ; Indianapolis, Indiana : 1922 ^ Jump up to : `` NowData -- NOAA Online Weather Data ''. National Oceanic and Atmospheric Administration. Retrieved 2017 - 08 - 29. Jump up ^ `` Station Name : IN EVANSVILLE REGIONAL AP ''. National Oceanic and Atmospheric Administration. Retrieved 2014 - 03 - 26. Jump up ^ `` WMO Climate Normals for EVANSVILLE / REGIONAL, IN 1961 -- 1990 ''. National Oceanic and Atmospheric Administration. Retrieved 2014 - 03 - 11. Jump up ^ `` NowData - NOAA Online Weather Data ''. National Oceanic and Atmospheric Administration. Retrieved 2013 - 03 - 20. Jump up ^ `` Station Name : IN INDIANAPOLIS ''. National Oceanic and Atmospheric Administration. Retrieved 2014 - 03 - 30. Jump up ^ `` WMO Climate Normals for INDIANAPOLIS / INT'L ARPT IN 1961 -- 1990 ''. National Oceanic and Atmospheric Administration. Retrieved 2014 - 03 - 11. State of Indiana Indianapolis ( capital ) Topics Index Geography Government Governor ( List ) Congressional districts ( Delegations ) History City Nicknames National Historic Landmarks State parks Symbols Transportation Tourist Attractions Index of Indiana - related articles Outline Seal of Indiana Society Hoosiers Culture Crime Demographics Economy Education Politics Party strength Sports Regions Central Indiana East Central Indiana Wabash Valley Northern Indiana Northeast Indiana Northwest Indiana Michiana Southern Indiana Indiana Uplands Kentuckiana Southwestern Indiana Largest cities Anderson Bloomington Carmel Columbus Elkhart Evansville Fishers Fort Wayne Gary Goshen Greenwood Hammond Indianapolis Jeffersonville Kokomo Lafayette Lawrence Michigan City Mishawaka Muncie New Albany Noblesville Portage Richmond South Bend Terre Haute Valparaiso Westfield Largest towns Brownsburg Clarksville Highland Merrillville Munster Plainfield Schererville Counties Adams Allen Bartholomew Benton Blackford Boone Brown Carroll Cass Clark Clay Clinton Crawford Daviess Dearborn Decatur DeKalb Delaware Dubois Elkhart Fayette Floyd Fountain Franklin Fulton Gibson Grant Greene Hamilton Hancock Harrison Hendricks Henry Howard Huntington Jackson Jasper Jay Jefferson Jennings Johnson Knox Kosciusko LaGrange Lake LaPorte Lawrence Madison Marion Marshall Martin Miami Monroe Montgomery Morgan Newton Noble Ohio Orange Owen Parke Perry Pike Porter Posey Pulaski Putnam Randolph Ripley Rush Saint Joseph Scott Shelby Spencer Starke Steuben Sullivan Switzerland Tippecanoe Tipton Union Vanderburgh Vermillion Vigo Wabash Warren Warrick Washington Wayne Wells White Whitley Geography of the United States States Alabama Alaska Arizona Arkansas California Colorado Connecticut Delaware Florida Georgia Hawaii Idaho Illinois Indiana Iowa Kansas Kentucky Louisiana Maine Maryland Massachusetts Michigan Minnesota Mississippi Missouri Montana Nebraska Nevada New Hampshire New Jersey New Mexico New York North Carolina North Dakota Ohio Oklahoma Oregon Pennsylvania Rhode Island South Carolina South Dakota Tennessee Texas Utah Vermont Virginia Washington West Virginia Wisconsin Wyoming Federal district Washington, D.C. Insular areas American Samoa Guam Northern Mariana Islands Puerto Rico U.S. Virgin Islands Outlying islands Baker Island Howland Island Jarvis Island Johnston Atoll Navassa Island Wake Island Retrieved from `` https://en.wikipedia.org/w/index.php?title=Geography_of_Indiana&oldid=807542706 '' Categories : Geography of Indiana Regions of Indiana Hidden categories : Pages using citations with accessdate and no URL Articles needing more detailed references All articles with specifically marked weasel - worded phrases Articles with specifically marked weasel - worded phrases from December 2009 Talk Contents About Wikipedia Add links This page was last edited on 28 October 2017, at 17 : 03. Text is available under the Creative Commons Attribution - ShareAlike License ; additional terms may apply. By using this site, you agree to the Terms of Use and Privacy Policy. Wikipedia ® is a registered trademark of the Wikimedia Foundation, Inc., a non-profit organization. About Wikipedia

Question: what landforms are found mostly in the southern part of indiana
Answer: the "Knobs," a series of 1,000 ft (300 m) hills that run parallel to the Ohio River