Grant County is a county in central Indiana in the United States Midwest. At the time of the 2020 census, the population was 66,674.^[1] The county seat is Marion.^[2] Important paleontological discoveries, dating from the Pliocene epoch, have been made at the Pipe Creek Sinkhole in Grant County.

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Grant County
County
Grant County Courthouse in Marion
Location within the U.S. state of Indiana
Indiana's location within the U.S.
Coordinates: 40°31′N 85°39′W
Country	United States
State	Indiana
Founded	1831
Named for	Samuel and Moses Grant
Seat	Marion
Largest city	Marion
Area
• Total	414.90 sq mi (1,074.6 km2)
• Land	414.07 sq mi (1,072.4 km2)
• Water	0.82 sq mi (2.1 km2)  0.20%
Population  (2020)
• Total	66,674
• Density	159/sq mi (61.4/km2)
Time zone	UTC−5 (Eastern)
• Summer (DST)	UTC−4 (EDT)
Congressional district	5th
Website	www.grantcounty.net
Indiana county number 27

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Grant County was formed in 1831 by settlers from Kentucky and Virginia. It was named for Captains Samuel and Moses Grant of Kentucky, who were killed fighting indigenous warriors north of the Ohio River.^[3] Their home county was also named for them, Grant County, Kentucky.

In 1831, Martin Boots and David Branson each donated 30 acres of land to begin a settlement called Marion. This land was on the north side of a fast-flowing and scenic river which the Miami Indians called Mississinewa. Marion was designated as the County Seat.^[4]

As the county was developed for agriculture, the county seat became a center of trade and business, as well as government and the court system. On 7 August 1930, a mob of an estimated 5,000 people took three African-American men, Thomas Shipp and Abram Smith, both 19, and James Cameron, 16, from the county jail. They were suspects in a robbery/murder and rape. The first two were hanged from trees in the courthouse square. Cameron was spared and later became a civil rights activist. This was the last lynching in Indiana.^[5]

In 1982, Stephen Johnson was elected as Grant County's first full-time prosecutor. He served for five terms, from 1983 through 2002.

Grant County consists of low rolling hills, covered with vegetation and devoted to agriculture or urban development.^[6] The Mississinewa River flows northwesterly through the center of the county toward Mississinewa Lake in adjacent Miami County. The highest terrain consists of two rises in southeast Upland, at 950 ft (290 m) ASL.^[7] According to the 2010 census, the county has a total area of 414.90 square miles (1,074.6 km²), of which 414.07 square miles (1,072.4 km²) (or 99.80%) is land and 0.82 square miles (2.1 km²) (or 0.20%) is water.^[8]

In recent years, average temperatures in Marion have ranged from a low of 16 °F (−9 °C) in January to a high of 85 °F (29 °C) in July, although a record low of −23 °F (−31 °C) was recorded in January 1985 and a record high of 108 °F (42 °C) was recorded in July 1936. Average monthly precipitation ranged from 2.03 inches (52 mm) in February to 4.73 inches (120 mm) in July.^[9]

The county government is a constitutional body, granted specific powers by the Constitution of Indiana and the Indiana Code.

County Council: The legislative branch of the county government; controls spending and revenue collection in the county. Representatives, elected to four-year terms from county districts, 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.^[10][11]

Board of Commissioners: The executive body of the county; commissioners are elected county-wide to staggered four-year terms. One commissioner 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.^[10][11]

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.^[11]

County Officials: The county has several other elected offices, including sheriff, coroner, auditor, treasurer, recorder, surveyor and circuit court clerk, elected to four-year terms. Members elected to county government positions are required to declare party affiliations and to be residents of the county.^[11]

Grant County is part of Indiana's 5th congressional district; Indiana Senate districts 17, 19 and 21;^[12] and Indiana House of Representatives districts 31, 32 and 82.^[13]

School districts include:^[25]

• Eastbrook Community School Corporation
• Madison-Grant United School Corporation
• Marion Community Schools
• Mississinewa Community School Corporation
• Oak Hill United School Corporation

• National Register of Historic Places listings in Grant County, Indiana