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Indiana Counties
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Indiana Counties

Indiana is divided into ninety-two counties. The oldest and newest Counties in Indiana are Knox County (created 1790) and Newton County (created 1857).Many Indiana counties are named for the US Founding Fathers and personalities of the American Revolutionary War, the War of 1812 and Battle of Tippecanoe; early leaders of Indiana Territory and Indiana, as well as surrounding states like Michigan and Kentucky; plus Native American tribes and geographical features.

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Hamilton County, Indiana

Hamilton County Education, Geography, and HistoryHamilton County, Indiana Courthouse

Hamilton County is a county located in the state of Indiana. Census 2010 recorded a population of 274,569. Hamilton County was created on April 7, 1823. The county seat is Noblesville. The county is named for Alexander Hamilton, first Secretary of the Treasury and founding father.

Hamilton County is included in the Indianapolis-Carmel-Anderson, IN Metropolitan Statistical Area

Etymology - Origin of Hamilton County Name

The county is named for Alexander Hamilton, aid to General George Washington throughout the Revolutionary War, first Treasurer of the United States most remembered for his fatal duel with Vice President Aaron Burr.


County QuickFacts: Census Bureau Quick Facts

Hamilton County History

Hamilton County was formally organized April 7, 1823.

Hamilton County is divided into 9 Civil Townships as follows: Adams, Clay, Delaware, Fall Creek, Jackson, Noblesville, Washington, Wayne and White River.

The land containing Hamilton County was brought into the possession of the United States by the Treaty of St. Mary's in 1818. William Conner was the first white settler in the county. In the summer of 1822, after realizing there were enough settlers in the area, Conner and other settlers applied to the Indiana Legislature for a charter authorizing them to become a separate and independent county under Indiana law. The application was presented to the Legislature at the 1822-23 session and the act was passed and approved by the Governor on January 8, 1823. The act took effect on the first Monday in April (April 7), 1823. The County Commissioners first met on May 5, 1823 at the house of William Conner. Conner's house would also serve as the County Circuit Court. The county was named after Alexander Hamilton, the first secretary of the treasury.

Geography: Land and Water

As reported by the Census Bureau, the county has a total area of 403 square miles (1,043 km2), of which 398 square miles (1,031 km2) is land and 5 square miles (12 km2) (1.19%) is water.

Hamilton county is located close to the center of Indiana.

Neighboring Counties

Bordering counties are as follows:

  • North: Tipton County
  • Northeast: Madison County
  • Southeast: Hancock County
  • South: Marion County
  • West: Boone County
  • Northwest: Clinton County


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