Marion County, Indiana
|Marion County, Indiana|
Location in the state of Indiana
Indiana's location in the U.S.
|Founded||April 01, 1822|
|Named for||Francis Marion|
403.01 sq mi (1,044 km²)
396.30 sq mi (1,026 km²)
6.71 sq mi (17 km²), 1.66%
2,280/sq mi (880.5/km²)
|Congressional districts||4th, 5th, 7th|
Marion County is a county located in the U.S. state of Indiana. Census 2010 recorded a population of 903,393, making it the largest county in the state and 55th most populated county in the country, greater than the population of six states. The county seat is Indianapolis, the state capital and largest city. Marion County is consolidated with Indianapolis through an arrangement known as Unigov.
According to the 2010 census, the county has a total area of 403.01 square miles (1,043.8 km2), of which 396.30 square miles (1,026.4 km2) (or 98.34%) is land and 6.71 square miles (17.4 km2) (or 1.66%) is water.
Adjacent counties 
- Hamilton County (north)
- Hancock County (east)
- Shelby County (southeast)
- Johnson County (south)
- Morgan County (southwest)
- Hendricks County (west)
- Boone County (northwest)
Major Highways 
Marion County was created on April 1, 1822 and was formed from Delaware New Purchase. It is named for Francis Marion, a Brigadier General from South Carolina in the American Revolutionary War.
The state capital was moved to Indianapolis in Marion County from Corydon on January 10, 1825. This began a period of rapid growth in population.
Climate and weather 
|Climate chart (explanation)|
In recent years, average temperatures in Indianapolis have ranged from a low of 18 °F (−8 °C) in January to a high of 84 °F (29 °C) in July, although a record low of −22 °F (−30 °C) was recorded in January 1985 and a record high of 104 °F (40 °C) was recorded in June 1988. Average monthly precipitation ranged from 2.05 inches (52 mm) in January to 4.78 inches (121 mm) in July.
|Sources: United States Department of Commerce,
Bureau of the Census, Population Division
As of the census of 2000, there were 860,454 people, 352,164 households, and 213,411 families residing in the county. The population density was 2,172 people per square mile (838/km²). There were 387,183 housing units at an average density of 977 per square mile (377/km²). The racial makeup of the county was 70.49% White, 24.17% Black or African American, 0.25% Native American, 1.43% Asian, 0.04% Pacific Islander, 1.98% from other races, and 1.64% from two or more races. 3.87% of the population were Hispanic or Latino of any race. 17.0% were of German, 12.7% American, 9.0% Irish and 7.3% English ancestry according to Census 2000.
2005 Census estimates for Marion County was 65.3% non-Hispanic white, 25.8% African-American, 5.9% Latino, and 1.5% Asian
In 2000 there were 352,164 households out of which 30.20% had children under the age of 18 living with them, 41.20% were married couples living together, 14.90% had a female householder with no husband present, and 39.40% were non-families. 31.80% of all households were made up of individuals and 8.70% had someone living alone who was 65 years of age or older. The average household size was 2.39 and the average family size was 3.03.
In the county the population was spread out with 25.80% under the age of 18, 10.00% from 18 to 24, 32.90% from 25 to 44, 20.20% from 45 to 64, and 11.10% who were 65 years of age or older. The median age was 34 years. For every 100 females there were 93.60 males. For every 100 females age 18 and over, there were 90.00 males.
The median income for a household in the county was $40,421, and the median income for a family was $49,387. Males had a median income of $36,503 versus $27,846 for females. The per capita income for the county was $21,789. About 8.70% of families and 11.40% of the population were below the poverty line, including 15.30% of those under age 18 and 8.00% of those age 65 or over.
Cities and towns 
Marion County has a consolidated city-county government, known as Unigov, in which only four municipalities retain full government autonomy (including a mayor and city council) as "excluded cities". The remaining municipalities within the county are "included towns" and exercise very limited authority, mainly in zoning and appointing their own police departments. They retain the ability to levy taxes for these purposes. Since many of these included towns were and remain fairly wealthy and influential within the county, they can still have considerable unofficial clout. Likewise, some neighborhoods that had already been formally incorporated into Indianapolis (such as Broad Ripple) possess similar influence.
Excluded cities in bold.
Marion County has nine townships roughly organized into a grid-like, three-by-three pattern. This arrangement can be seen below, with the top being north.
|2012||38.1% 136,102||60.2% 215,428||1.7% 6,137|
|2008||35.4% 134,313||63.8% 241,987||0.8% 3,062|
|2004||48.6% 156,072||50.6% 162,249||0.8% 2,376|
|2000||49.2% 140,169||47.9% 134,553||2.9% 6,569|
|1996||47.2% 133,329||44.1% 124,448||8.7% 24,437|
|1992||39.8% 141,369||37.8% 122,234||22.5% 60,187|
|1988||58.6% 184,519||40.8% 128,627||0.6% 1,949|
|1984||58.3% 184,880||41.0% 130,185||0.7% 2,083|
|1980||53.7% 168,680||40.1% 126,103||6.2% 19,486|
|1976||54.6% 177,767||44.6% 145,274||0.8% 2,535|
|1972||66.5% 206,065||33.0% 102,166||0.5% 1,535|
|1968||52.3% 162,503||37.2% 115,715||10.5% 32,704|
|1964||48.3% 143,015||51.4% 152,418||0.3% 948|
|1960||57.7% 166,202||42.1% 121,336||0.2% 668|
Marion County was up until the mid-2000s a Republican stronghold in presidential elections, giving majorities to Republicans from 1968 to 2000. Although the county then began trending Democratic, with John Kerry winning a majority in 2004, the first Democrat since Lyndon B. Johnson in 1964. The trend continued in 2008 and 2012 with Barack Obama showing strongly in Marion County, winning 64% and 60% of the vote respectively.
Marion is part of Indiana's 7th congressional district, which is located in the heart of the county and held by Democrat André Carson. Indiana's 5th congressional district runs along the northern edge of the county, which is held by Republican Susan Brooks. In the Indiana House of Representatives Marion is represented by 15 seats in the Indiana House of Representatives, 86th through 100th districts, nine seats held by Democrats and six by Republicans. In the State Senate Marion is part of the 28th, 30th and 32nd through 36th districts, which are held by four Democrats and three Republicans.
The Indianapolis City-County Council is the city legislature of Indianapolis, Indiana and Marion County, known as Unigov. It was formally established in 1970 upon the merger of the city government with the county government. The council passes ordinances for the city and county, and also makes appointments to certain boards and commissions.
County elected officials
- Mayor (County Executive): Greg Ballard (R)
- Auditor: Billie Breaux (D)
- Clerk: Elizabeth White (D)
- Coroner: Frank Lloyd, Jr. (D)
- Assessor: Joseph P. O'Connor (D)
- Prosecutor: Terry Curry (D)
- Recorder: Julie Voorhies (D)
- Sheriff: John R. Layton (D)
- Surveyor: Debra S. Jenkins (D)
- Treasurer: Michael Rodman (D)
County commissioners: Breaux, O'Connor, Rodman
- "Marion County QuickFacts". United States Census Bureau. Retrieved 2011-09-25.
- "Find a County". National Association of Counties. Retrieved 2011-06-07.
- "Census 2010 U.S. Gazetteer Files: Counties". United States Census. Retrieved 2011-10-10.
- "Marion County History and Information". GenealogyInc.com. Retrieved November 27, 2008.
- Baker, Ronald L.; Marvin Carmony (1995). Indiana Place Names. Bloomington: Indiana University Press. p. 98. ISBN 0-253-28340-X.
- De Witt Clinton Goodrich & Charles Richard Tuttle (1875). An Illustrated History of the State of Indiana. Indiana: R. S. Peale & co. p. 567.
- "Monthly Averages for Indianapolis, Indiana". The Weather Channel. Retrieved 2011-01-27.
- Forstall, Richard L. (editor) (1996). Population of states and counties of the United States: 1790 to 1990 : from the twenty-one decennial censuses. United States Department of Commerce, Bureau of the Census, Population Division. pp. 50–53. ISBN 0-934213-48-8.
- "American FactFinder". United States Census Bureau. Retrieved 2008-01-31.
- Marion County QuickFacts from the US Census Bureau
- Indianapolis and Marion County Official Website
- Marion County InDepth Profile: STATS Indiana
- County Highlights: Marion County: Hoosiers by the Numbers
||Boone County||Hamilton County|
|Hendricks County||Hancock County|
|Morgan County||Johnson County||Shelby County|