Allen County Map, Ohio

Written and Fact-checked by | Updated On: April 30, 2026 | 13:31 ET

Map of Allen County - Allen County is a county located in the U.S. state of Ohio. Allen County Map showing cities, highways, important places and water bodies. Get Where is Allen County located in the map, major cities in Allen county, population, areas, and places of interest.

Map of Allen County, Ohio

Map of Allen County, Ohio

About Allen County Map, Ohio: The map showing the county boundary, county seat, major cities, highways, water bodies and neighbouring counties.

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About Allen County, Ohio

Allen County is a county located in the U.S. state of Ohio. It's county seat is Lima. As per 2020 census, the population of Allen County is 101670 people and population density is square miles. According to the United States Census Bureau, the county has a total area of 404.43 sq mi (1,047 km2). Allen County was established on -29158.

Allen County Facts

ContinentNorth America
CountryUnited States
StateOhio
County SeatLima
Largest City/TownLima
Established1831
Total Area407 sq mi
Land Area402 sq mi
Water Area5 sq mi
Population102,351 (Census 2020)
Population Density254 people per sq mi
Time ZoneEastern (EST)
Major HighwaysI-75, US-30, US-224, SR-117
Neighboring CountiesAuglaize County, Hardin County, Putnam County, Hancock County, Van Wert County
Famous ForLima petroleum history, manufacturing, agriculture
Top AttractionsAllen County Museum, Veterans Memorial Civic Center, Faurot Park
Official Websitehttps://www.allencountyohio.com

Cities and Towns in Allen County, Ohio

  • Lima (county seat) – 35,579 (Census 2020)
  • Delphos – 6,698 (Census 2020)
  • Spencerville – 2,261 (Census 2020)
  • Lafayette – 406 (Census 2020)

Roads and Highways in Allen County, Ohio

Allen County is a transportation hub in northwest Ohio with major highways connecting it to regional cities and interstate routes.

  • Interstate 75 (I-75) – Major north-south corridor connecting Lima to Toledo and Cincinnati
  • U.S. Route 30 (US-30) – East-west route linking the county to Fort Wayne and Mansfield
  • U.S. Route 224 (US-224) – Connects local communities across northwest Ohio
  • State Route 117 (SR-117) – Links Lima with surrounding rural areas

Neighboring Counties of Allen County

  • Auglaize County (east)
  • Hardin County (southeast)
  • Putnam County (north)
  • Hancock County (northeast)
  • Van Wert County (west)

Top Attractions in Allen County, Ohio

Allen County offers museums, parks, and cultural attractions centered around Lima.

  • Allen County Museum – Local history museum with exhibits and artifacts
  • Veterans Memorial Civic Center – Event venue for concerts and performances
  • Faurot Park – Large city park with trails and recreation areas
  • Lincoln Park Railway Exhibit – Historic railroad display
  • Lima Stadium – Sports and community events venue
  • Shawnee Country Club – Golf and recreational facility
  • Johnny Appleseed Park (nearby region influence) – Popular outdoor space

Distance from Allen County to Nearby Cities

  • Lima to Columbus – 80 mi (129 km)
  • Lima to Toledo – 100 mi (161 km)
  • Lima to Dayton – 75 mi (121 km)
  • Lima to Fort Wayne, IN – 75 mi (121 km)
  • Lima to Cincinnati – 130 mi (209 km)

FAQs about Allen County

What is Allen County, Ohio known for?

Allen County is known for Lima’s industrial history, manufacturing, and agriculture.

What is the county seat of Allen County?

Lima is the county seat of Allen County.

Is Allen County part of northwest Ohio?

Yes, Allen County is located in northwest Ohio.

What are popular attractions in Allen County?

Visitors enjoy museums, parks, civic centers, and local history sites.

Which major highway runs through Allen County?

Interstate 75 runs through Allen County connecting it to major Ohio cities.