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Dearborn County is one of 92 counties of the U.S. state of Indiana. Located on the Ohio border near the southeast corner of the state, Dearborn County was formed in 1803 from a portion of Hamilton County, Ohio. In 2020, the population was 50,679.[1] The county seat and largest city is Lawrenceburg.[2] Dearborn County is part of the Cincinnati, OH-KY-IN Metropolitan Statistical Area.
Dearborn County | |
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 Location within the U.S. state of Indiana | |
 Indiana's location within the U.S. | |
| Coordinates: 39°09′N 84°59′W | |
| Country |  United States |
| State |  Indiana |
| Founded | 1803 |
| Named for | Dr. Henry Dearborn |
| Seat | Lawrenceburg |
| Largest city | Lawrenceburg |
| Area | |
• Total | 307.42 sq mi (796.2 km2) |
| • Land | 305.03 sq mi (790.0 km2) |
| • Water | 2.38 sq mi (6.2 km2) 0.77% |
| Population (2020) | |
• Total | 50,679 |
• Estimate (2023) | 51,215  |
| • Density | 160/sq mi (64/km2) |
| Demonym | Dearbornian |
| Time zone | UTC−5 (Eastern) |
| • Summer (DST) | UTC−4 (EDT) |
| Congressional district | 6th |
| Website | www |
| Indiana county number 15 | |
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In 1803, following Ohio's admission to the Union, a wedge, or pie shaped, remnant of the former Northwest Territory along Ohio's southwestern border was ceded to Indiana Territory and organized as Dearborn County. It was named after Henry Dearborn who was U.S. Secretary of War at that time.[3] Lawrenceburg was then designated as the county seat.
All or part of seven other present day counties were carved from the original county with the present boundaries being established in 1845. The region, nicknamed the "Gore", slices through the present-day counties of Dearborn, Franklin, Ohio, Randolph, Switzerland, Union, Wayne and Fayette.[4] Subdivision of Dearborn County began in 1811 with the formation of Franklin and Wayne Counties, followed by Switzerland in 1814.[4]
Early growth in the region was centered on Lawrenceburg which became an important railroad junction connecting two of the regions major rail lines.[5] A contention existed between the towns of Lawrenceburg and the mostly German-speaking immigrants that dominated Rising Sun over the favored status of Lawrenceburg as the county seat. The rivalry between the two towns was resolved in 1844 when the Indiana State legislature separated the portion of Dearborn County south of Laughery Creek and created the last and smallest Indiana county, county of Ohio on March 1, 1844, with Rising Sun designated as its county seat.[6]
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According to the 2010 census, the county has a total area of 307.42 square miles (796.2 km2), of which 305.03 square miles (790.0 km2) (or 99.22%) is land and 2.38 square miles (6.2 km2) (or 0.77%) is water.[7] Part of the southeastern county line is formed by the Ohio River.
Cities
Towns
Census-designated places
Other unincorporated communities
Townships
Adjacent counties
- Franklin County (north)
- Butler County, Ohio (northeast)
- Hamilton County, Ohio (east)
- Boone County, Kentucky (southeast)
- Ohio County (south)
- Ripley County (west)
Climate
In recent years, average temperatures in Lawrenceburg have ranged from a low of 21 °F (−6 °C) in January to a high of 86 °F (30 °C) in July, although a record low of −27 °F (−33 °C) was recorded in January 1994 and a record high of 107 °F (42 °C) was recorded in July 1988. Average monthly precipitation ranged from 2.94 inches (75 mm) in September to 5.53 inches (140 mm) in May.[8]
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| Census | Pop. | Note | %± |
|---|---|---|---|
| 1810 | 7,310 | — | |
| 1820 | 11,468 | 56.9% | |
| 1830 | 13,974 | 21.9% | |
| 1840 | 19,327 | 38.3% | |
| 1850 | 20,166 | 4.3% | |
| 1860 | 24,406 | 21.0% | |
| 1870 | 24,116 | −1.2% | |
| 1880 | 26,671 | 10.6% | |
| 1890 | 23,364 | −12.4% | |
| 1900 | 22,194 | −5.0% | |
| 1910 | 21,396 | −3.6% | |
| 1920 | 20,033 | −6.4% | |
| 1930 | 21,056 | 5.1% | |
| 1940 | 23,053 | 9.5% | |
| 1950 | 25,141 | 9.1% | |
| 1960 | 28,674 | 14.1% | |
| 1970 | 29,430 | 2.6% | |
| 1980 | 34,291 | 16.5% | |
| 1990 | 38,835 | 13.3% | |
| 2000 | 46,109 | 18.7% | |
| 2010 | 50,047 | 8.5% | |
| 2020 | 50,679 | 1.3% | |
| 2023 (est.) | 51,215 | [9] | 1.1% |
| U.S. Decennial Census[10] 1790-1960[11] 1900-1990[12] 1990-2000[13] 2010-2013[1] | |||
At the 2010 United States Census, there were 50,047 people, 18,743 households and 13,773 families residing in the county.[14] The population density was 164.1 inhabitants per square mile (63.4/km2). There were 20,171 housing units at an average density of 66.1 per square mile (25.5/km2).[7] The racial makeup of the county was 97.5% white, 0.6% black or African American, 0.4% Asian, 0.2% American Indian, 0.1% Pacific islander, 0.3% from other races, and 1.0% from two or more races. Those of Hispanic or Latino origin made up 1.0% of the population.[14] In terms of ancestry, 46.5% were German, 19.2% were Irish, 11.4% were English, and 7.8% were American.[15]
Of the 18,743 households, 35.1% had children under the age of 18 living with them, 58.5% were married couples living together, 10.0% had a female householder with no husband present, 26.5% were non-families, and 22.0% of all households were made up of individuals. The average household size was 2.64 and the average family size was 3.07. The median age was 40.0 years.[14]
The median household income was $47,697 and the median family income was $66,561. Males had a median income of $45,270 and females $33,353. The per capita income was $25,023. About 4.5% of families and 7.2% of the population were below the poverty line, including 8.5% of those under age 18 and 6.3% of those age 65 or over.[16]
2020 census
| Race | Num. | Perc. |
|---|---|---|
| White (NH) | 47,319 | 93.37% |
| Black or African American (NH) | 292 | 0.6% |
| Native American (NH) | 66 | 0.13% |
| Asian (NH) | 211 | 0.42% |
| Pacific Islander (NH) | 9 | 0.02% |
| Other/Mixed (NH) | 2,058 | 4.06% |
| Hispanic or Latino | 724 | 1.43% |
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The county government is a constitutional body, and is granted specific powers by the Constitution of Indiana, and by the Indiana Code.
County Council: The county council is the legislative branch of the county government and controls all the spending and revenue collection in the county. Representatives are elected from county districts. The council members serve four-year terms. They are responsible for setting salaries, the annual budget, and special spending. The council also has limited authority to impose local taxes, in the form of an income and property tax that is subject to state level approval, excise taxes, and service taxes.[18][19] [20] Board of Commissioners: The executive body of the county is made of a board of commissioners. The commissioners are elected county-wide, in staggered terms, and each serves a four-year term. One of the commissioners, typically the most senior, serves as president. The commissioners are charged with executing the acts legislated by the council, collecting revenue, and managing the day-to-day functions of the county government.[18][19]
Court: Dearborn County's courts consist of a Circuit Court, presided over by the Honorable James Humphrey (shared with Ohio County in the only such arrangement in the state[21]) and two Superior Courts, the Honorable Jonathan Cleary, presiding over Dearborn County Superior Court No. 1 and the Honorable Sally McLaughlin, presiding over Dearborn County z Superior Court No. 2. Judges are elected to six-year terms. Lawrenceburg also has City Courts, presided over by the Honorable Joseph R. Johns. The Lawrenceburg City Court Judge serves a four-year term.
County Officials: The county has several other elected offices, including sheriff, prosecuting attorney, coroner, auditor, treasurer, recorder, surveyor, and circuit court clerk. Each of these elected officers serves a term of four years and oversees a different part of county government. Members elected to county government positions are required to declare a party affiliation and to be residents of the county.[19]
Dearborn County is part of Indiana's 6th congressional district; Indiana Senate district 43;[22] and Indiana House of Representatives districts 55 and 68.[23]
| Year | Republican | Democratic | Third party(ies) | |||
|---|---|---|---|---|---|---|
| No. | % | No. | % | No. | % | |
| 2024 | 20,844 | 78.36% | 5,335 | 20.06% | 421 | 1.58% |
| 2020 | 19,528 | 76.78% | 5,446 | 21.41% | 460 | 1.81% |
| 2016 | 18,113 | 75.06% | 4,883 | 20.24% | 1,135 | 4.70% |
| 2012 | 15,394 | 68.86% | 6,528 | 29.20% | 434 | 1.94% |
| 2008 | 14,886 | 67.00% | 7,123 | 32.06% | 208 | 0.94% |
| 2004 | 14,231 | 67.87% | 6,596 | 31.46% | 142 | 0.68% |
| 2000 | 11,452 | 64.88% | 6,020 | 34.11% | 178 | 1.01% |
| 1996 | 8,318 | 50.60% | 6,269 | 38.13% | 1,852 | 11.27% |
| 1992 | 6,974 | 44.80% | 5,116 | 32.86% | 3,477 | 22.34% |
| 1988 | 8,195 | 61.57% | 5,066 | 38.06% | 48 | 0.36% |
| 1984 | 9,149 | 64.74% | 4,920 | 34.81% | 63 | 0.45% |
| 1980 | 7,467 | 56.36% | 5,135 | 38.76% | 647 | 4.88% |
| 1976 | 6,176 | 49.04% | 6,348 | 50.40% | 71 | 0.56% |
| 1972 | 7,689 | 64.69% | 4,137 | 34.81% | 59 | 0.50% |
| 1968 | 6,208 | 48.65% | 4,842 | 37.95% | 1,710 | 13.40% |
| 1964 | 5,473 | 41.47% | 7,699 | 58.33% | 26 | 0.20% |
| 1960 | 7,619 | 54.99% | 6,216 | 44.87% | 19 | 0.14% |
| 1956 | 7,189 | 56.40% | 5,535 | 43.43% | 22 | 0.17% |
| 1952 | 7,091 | 54.82% | 5,810 | 44.92% | 33 | 0.26% |
| 1948 | 5,353 | 46.70% | 6,040 | 52.70% | 69 | 0.60% |
| 1944 | 5,487 | 51.32% | 5,157 | 48.24% | 47 | 0.44% |
| 1940 | 5,908 | 49.29% | 6,038 | 50.37% | 41 | 0.34% |
| 1936 | 4,669 | 41.48% | 6,366 | 56.56% | 221 | 1.96% |
| 1932 | 4,716 | 41.83% | 6,429 | 57.02% | 130 | 1.15% |
| 1928 | 6,334 | 58.49% | 4,459 | 41.18% | 36 | 0.33% |
| 1924 | 4,588 | 48.11% | 4,330 | 45.41% | 618 | 6.48% |
| 1920 | 5,159 | 50.66% | 4,884 | 47.96% | 140 | 1.37% |
| 1916 | 2,318 | 42.18% | 3,010 | 54.78% | 167 | 3.04% |
| 1912 | 1,366 | 25.93% | 2,957 | 56.13% | 945 | 17.94% |
| 1908 | 2,520 | 41.81% | 3,365 | 55.83% | 142 | 2.36% |
| 1904 | 2,588 | 42.99% | 3,264 | 54.22% | 168 | 2.79% |
| 1900 | 2,533 | 42.00% | 3,371 | 55.89% | 127 | 2.11% |
| 1896 | 2,714 | 44.75% | 3,313 | 54.62% | 38 | 0.63% |
| 1892 | 2,274 | 39.20% | 3,397 | 58.56% | 130 | 2.24% |
| 1888 | 2,648 | 42.25% | 3,531 | 56.33% | 89 | 1.42% |
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Major highways
- Nick Goepper professional slopestyle skier, three-time winter Olympic medalist
- Erwin "Cannonball" Baker, motorcycle and auto racer, 1989 inductee in Motorsports Hall of Fame of America
- John Whiteaker, first state Governor of Oregon from 1859 until 1862 and Oregon's Congressman from 1879 to 1881
- Jim Lyttle, professional baseball player
- Lonnie Mack, influential guitar soloist of early rock 'n' roll
- Louis Skidmore, architect that co-founded Skidmore, Owings & Merrill
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