|Clinton County, Indiana|
Clinton County Courthouse in Frankfort, Indiana
Location within the U.S. state of Indiana
Indiana's location within the U.S.
|Named for||DeWitt Clinton|
|• Total||405.25 sq mi (1,050 km2)|
|• Land||405.07 sq mi (1,049 km2)|
|• Water||0.18 sq mi (0 km2), 0.04%|
|• ( 2010)||33,224|
|• Density||82.0/sq mi (31.67/km2)|
|Time zone||Eastern: UTC−5/ −4|
|Footnotes: Indiana county number 12|
Clinton County officially came into existence on March 1, 1830, and was named in honor of DeWitt Clinton,  the seventh Governor of New York State and architect of the Erie Canal, which opened up the Upper Midwest to settlement. The act forming the county was approved by the Indiana General Assembly on January 29, 1830, and created Clinton from the eastern parts of neighboring Tippecanoe County.
According to the 2010 census, the county has a total area of 405.25 square miles (1,049.6 km2), of which 405.07 square miles (1,049.1 km2) (or 99.96%) is land and 0.18 square miles (0.47 km2) (or 0.04%) is water. . There is E85 in Clinton County.
- Carroll County (north)
- Howard County (northeast)
- Tipton County (east)
- Hamilton County (southeast)
- Boone County (south)
- Montgomery County (southwest)
- Tippecanoe County (west)
- Interstate 65
- U.S. Route 52
- U.S. Route 421
- Indiana State Road 26
- Indiana State Road 28
- Indiana State Road 29
- Indiana State Road 38
- Indiana State Road 39
- Indiana State Road 75
Clinton County is served by the Frankfort Municipal Airport.
|Climate chart ( explanation)|
In recent years, average temperatures in Frankfort have ranged from a low of 16 °F (−9 °C) in January to a high of 84 °F (29 °C) in July, although a record low of −26 °F (−32 °C) was recorded in December 1983 and a record high of 105 °F (41 °C) was recorded in July 1980. Average monthly precipitation ranged from 2.03 inches (52 mm) in February to 4.51 inches (115 mm) in June. 
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.  
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.  
Court: The county maintains a small claims court that can handle some civil cases. The judge on the court is elected to a term of four years and must be a member of the Indiana Bar Association. The judge is assisted by a constable who is also elected to a four-year term. In some cases, court decisions can be appealed to the state-level circuit court. 
County Officials: The county has several other elected offices, including sheriff, 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. 
|U.S. Decennial Census
1790-1960  1900-1990 
1990-2000  2010-2013 
As of the 2010 United States Census, there were 33,224 people, 12,105 households, and 8,754 families residing in the county.  The population density was 82.0 inhabitants per square mile (31.7/km2). There were 13,321 housing units at an average density of 32.9 per square mile (12.7/km2).  The racial makeup of the county was 91.0% white, 0.4% black or African American, 0.2% Asian, 0.2% American Indian, 6.8% from other races, and 1.3% from two or more races. Those of Hispanic or Latino origin made up 13.2% of the population.  In terms of ancestry, 22.4% were German, 11.1% were American, 10.3% were Irish, and 9.6% were English. 
Of the 12,105 households, 36.1% had children under the age of 18 living with them, 55.5% were married couples living together, 11.1% had a female householder with no husband present, 27.7% were non-families, and 23.1% of all households were made up of individuals. The average household size was 2.68 and the average family size was 3.13. The median age was 37.5 years. 
The median income for a household in the county was $47,697 and the median income for a family was $57,445. Males had a median income of $42,009 versus $29,086 for females. The per capita income for the county was $21,131. About 7.5% of families and 11.7% of the population were below the poverty line, including 17.0% of those under age 18 and 6.4% of those age 65 or over. 
- History of Clinton County, Indiana: Together with Sketches of Its Cities, Villages and Towns, Educational, Religious, Civil, Military, and Political ... Citizens. Charleston: Nabu Press (2010). ISBN 1-149-98613-1
- "Clinton County QuickFacts". United States Census Bureau. Retrieved 2011-09-17.
- "Find a County". National Association of Counties. Archived from the original on 2011-05-31. Retrieved 2011-06-07.
- Claybaugh, Joseph (1913). History of Clinton County, Indiana. Indianapolis: A. W. Bowen & Company. p. 31.
- "Population, Housing Units, Area, and Density: 2010 - County". United States Census Bureau. Retrieved 2015-07-10.
- "Monthly Averages for Frankfort, Indiana". The Weather Channel. Retrieved 2011-01-27.
- Indiana Code. "Title 36, Article 2, Section 3". IN.gov. Retrieved 2008-09-16.
- Indiana Code. "Title 2, Article 10, Section 2" (PDF). IN.gov. Retrieved 2008-09-16.
- "Indiana Senate Districts". State of Indiana. Retrieved 2011-01-23.
- "Indiana House Districts". State of Indiana. Retrieved 2011-01-23.
- Leip, David. "Dave Leip's Atlas of U.S. Presidential Elections". uselectionatlas.org. Retrieved 2018-05-14.
- "Population and Housing Unit Estimates". Retrieved June 9, 2017.
- "U.S. Decennial Census". United States Census Bureau. Archived from the original on May 12, 2015. Retrieved July 10, 2014.
- "Historical Census Browser". University of Virginia Library. Retrieved July 10, 2014.
- "Population of Counties by Decennial Census: 1900 to 1990". United States Census Bureau. Retrieved July 10, 2014.
- "Census 2000 PHC-T-4. Ranking Tables for Counties: 1990 and 2000" (PDF). United States Census Bureau. Retrieved July 10, 2014.
- "DP-1 Profile of General Population and Housing Characteristics: 2010 Demographic Profile Data". United States Census Bureau. Retrieved 2015-07-10.
- "DP02 SELECTED SOCIAL CHARACTERISTICS IN THE UNITED STATES – 2006-2010 American Community Survey 5-Year Estimates". United States Census Bureau. Retrieved 2015-07-10.
- "DP03 SELECTED ECONOMIC CHARACTERISTICS – 2006-2010 American Community Survey 5-Year Estimates". United States Census Bureau. Retrieved 2015-07-10.
- Clinton County Chamber of Commerce
- Clinton County History and Genealogy from US GenWeb
- Clinton County Economic Development