In 1787, the US defined the Northwest Territory which included the area of present-day Indiana. In 1800, Congress separated Ohio from the Northwest Territory, designating the rest of the land as the Indiana Territory.[3] President Thomas Jefferson chose William Henry Harrison as the governor of the territory, and Vincennes was established as the capital.[4] After the Michigan Territory was separated and the Illinois Territory was formed, Indiana was reduced to its current size and geography.[3] By December 1816 the Indiana Territory was admitted to the Union as a state.
Starting in 1794, Native American titles to Indiana lands were extinguished by usurpation, purchase, or war and treaty. The United States acquired land from the Native Americans in the 1809 treaty of Fort Wayne, and by the treaty of St. Mary's in 1818 considerably more territory became property of the government. This included the future Decatur County, which was authorized by the state legislature on 12 December 1821. No settler was allowed in the area until the government survey was completed in 1820.
The low rolling hills are devoted to agriculture or urban development, with only the areas carved by drainages still wooded.[7] The highest point (1,097 feet/334 meters ASL) is a hillock 0.8 miles (1.3 km) SSE from Kingston.[8]
The Flatrock River flows westward through the upper part of the county, continuing into Shelby County. Clifty Creek flows southwestward through the central part of the county, continuing into Bartholomew, and Sand Creek flows south-southwestward through the lower center of the county, continuing into Jennings County.
According to the 2010 census, the county has a total area of 373.32 square miles (966.9 km2), of which 372.57 square miles (965.0 km2) (or 99.80%) is land and 0.76 square miles (2.0 km2) (or 0.20%) is water.[9]
Tree on the Courthouse Tower in Greensburg, Indiana
In recent years, average temperatures in Greensburg have ranged from a low of 19 °F (−7 °C) in January to a high of 85 °F (29 °C) in July, although a record low of −24 °F (−31 °C) was recorded in January 1985 and a record high of 105 °F (41 °C) was recorded in July 1954. Average monthly precipitation ranged from 2.42 inches (61 mm) in February to 5.03 inches (128 mm) in May.[10]
County Council: The legislative branch of the county government; controls spending and revenue collection in the county. Representatives are elected to four-year terms from county districts. They set salaries, the annual budget, and special spending. The council 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.[11][12]
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 execute acts legislated by the council, collect revenue, and manage the county government.[11][12]
Court: The county maintains a small claims court that handles 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.[12]
County Officials: The county has other elected offices, including sheriff, coroner, auditor, treasurer, recorder, surveyor, and circuit court clerk. These officers are elected to four-year terms. Members elected to county government positions are required to declare a party affiliation and to be residents of the county.[12]
US Decennial Census[17] 1790–1960[18] 1900–1990[19] 1990–2000[20] 2010–2013[1]
2010 Census
As of the 2010 United States Census, there were 25,740 people, 9,977 households, and 6,995 families in the county.[21] The population density was 69.1 inhabitants per square mile (26.7/km2). There were 11,209 housing units at an average density of 30.1 per square mile (11.6/km2).[9] The racial makeup of the county was 97.3% white, 0.7% Asian, 0.3% black or African American, 0.2% American Indian, 0.6% from other races, and 0.9% from two or more races. Those of Hispanic or Latino origin made up 1.7% of the population.[21] In terms of ancestry, In terms of ancestry, 35.5% were of English ancestry, 35.1% were of German, and 9.0% were of Irish ancestry according to 2010 American Community Survey.
Of the 9,977 households, 33.8% had children under the age of 18 living with them, 54.6% were married couples living together, 10.6% had a female householder with no husband present, 29.9% were non-families, and 25.0% of all households were made up of individuals. The average household size was 2.54 and the average family size was 3.02. The median age was 38.7 years.[21]
The median income for a household in the county was $47,697 and the median income for a family was $52,308. Males had a median income of $41,143 versus $30,226 for females. The per capita income for the county was $22,719. About 8.3% of families and 10.8% of the population were below the poverty line, including 17.3% of those under age 18 and 6.8% of those age 65 or over.[22]
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