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.

Jay County, Indiana

Jay County Education, Geography, and HistoryJay County, Indiana Courthouse

Jay County is a county located in the state of Indiana. As of 2010, the population was 21,253. Jay County was created on March 1, 1836. The county seat is Portland. The county is named for John Jay, first Chief Justice of the United States Supreme Court.

Etymology - Origin of Jay County Name

The county is named for John Jay who was Secretary of State of the United States, Chief Justice of the Supreme Court and Governor of New York.


County QuickFacts: CensusBureau Quick Facts

JayCounty History

Jay County was formally organized March 1, 1836. It is the only county in the United States named for John Jay, co-author of the Federalist Papers, Secretary of Foreign Affairs under the Articles of Confederation, and first Chief Justice of the United States. John Jay died in 1829.

Jay County is divided into 12 Civil Townships as follows: Bear Creek, Greene, Jackson, Jefferson, Knox, Madison, Noble, Penn, Pike, Richland, Wabash and Wayne.

Geography: Land and Water

As reported by the Census Bureau, the county has a total area of 384 square miles (994 km2), of which 384 square miles (994 km2) is land and 0 square miles (0 km2) (0.05%) is water.

Jay county is located in northeast Indiana. The Limberlost, an extensive wetland comprising approximately 13,000 acres is located in part of Jay  county.

Neighboring Counties

Bordering counties are as follows:

  • North: Adams County
  • Northeast: Mercer County, Ohio
  • Southeast: Darke County, Ohio
  • South: Randolph County
  • Southwest: Delaware County
  • West: Blackford County
  • Northwest: Wells County


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