Adams County, Indiana

Adams County sits in the northeastern corner of Indiana, bordering Ohio. Decatur, the county seat and largest city, serves as the county’s main community. The county has a rich history dating back to its founding in 1836. Today, about 36,000 people call Adams County home.

Farmers’ fields stretch as far as the eye can see, broken up by patches of woodland and winding creeks. Amish communities add a unique cultural character to the area, and you may even spot horse-drawn buggies sharing the roads with cars.

U.S. Highway 27 cuts through the county, connecting it with larger cities and surrounding areas. The Limberlost State Historic Site was once home to author Gene Stratton-Porter. The site attracts visitors interested in early 20th-century literature, history, and nature.

CategoryDetails
County NameAdams County
County SeatDecatur
Population36,000 (estimated)
Cities, Towns, and CommunitiesDecatur, Berne, Monroe, Geneva, Pleasant Mills, Magley, Monroe, and Peterson
Interstates and HighwaysUS-27, US-33, IN-101, IN-116, IN-124, IN-218
FIPS Code18-001
Total Area (Land and Water)339 square miles (Land: 339 sq mi, Water: 0 sq mi)
Adjacent Counties (and Direction)Allen County (North), Van Wert County, Ohio (Northeast), Mercer County, Ohio (Southeast), Jay County (South), Wells County (West), Whitley County (Northwest)
Time ZoneEastern Time Zone (ET)
StateIndiana
Coordinates40.7451° N, 84.9367° W
EtymologyNamed after John Quincy Adams, the 2nd President of the United States
Major LandmarksLimberlost State Memorial, Kekionga Park, Adams County Historical Museum
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