Hamilton County Map, Ohio

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

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

Map of Hamilton County, Ohio

Map of Hamilton County, Ohio

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

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About Hamilton County, Ohio

Hamilton County is a county located in the U.S. state of Ohio. It's county seat is Cincinnati. As per 2020 census, the population of Hamilton County is 826139 people and population density is square miles. According to the United States Census Bureau, the county has a total area of 407.36 sq mi (1,055 km2). Hamilton County was established on -40173.

Hamilton County Facts

ContinentNorth America
CountryUnited States
StateOhio
County SeatCincinnati
Largest City/TownCincinnati
EstablishedJanuary 2, 1790
Total Area413 sq mi (1,070 sq km)
Land Area406 sq mi (1,051 sq km)
Water Area6.7 sq mi (17.4 sq km)
Population830,639 (Census 2020)
Population Density2,046 people per sq mi
Time ZoneEastern Time Zone (ET)
Major HighwaysI-71, I-74, I-75, I-275, US-27, US-50, US-52
Neighboring CountiesButler County, Warren County, Clermont County, Boone County (KY), Kenton County (KY), Dearborn County (IN)
Famous ForCincinnati, Ohio River, cultural attractions, sports teams
Top AttractionsCincinnati Zoo, Kings Island (nearby), Fountain Square, Cincinnati Museum Center
Official Websitehttps://www.hamiltoncountyohio.gov/

Cities and Towns in Hamilton County, Ohio

  • Cincinnati (county seat) – 309,317 (Census 2020)
  • Norwood – 19,043 (Census 2020)
  • Forest Park – 20,189 (Census 2020)
  • Blue Ash – 12,513 (Census 2020)

Roads and Highways in Hamilton County, Ohio

Hamilton County has a major highway network centered around Cincinnati, providing strong regional and interstate connections.

  • I-71 – connects Cincinnati to Columbus and Cleveland
  • I-74 – runs northwest connecting Cincinnati to Indianapolis
  • I-75 – major north-south interstate linking Detroit to Florida through Cincinnati
  • I-275 – beltway surrounding the Cincinnati metropolitan area
  • US-27 – runs north-south through Cincinnati into Kentucky
  • US-50 – east-west route connecting Cincinnati to southeastern Ohio
  • US-52 – follows the Ohio River connecting towns along the river corridor

Neighboring Counties of Hamilton County

  • Butler County (north)
  • Warren County (northeast)
  • Clermont County (east)
  • Boone County, Kentucky (southwest)
  • Kenton County, Kentucky (south)
  • Dearborn County, Indiana (west)

Top Attractions in Hamilton County, Ohio

Hamilton County is a major cultural and entertainment hub with attractions along the Ohio River and throughout Cincinnati.

  • Cincinnati Zoo and Botanical Garden – one of the oldest zoos in the United States
  • Fountain Square – central gathering place in downtown Cincinnati
  • Cincinnati Museum Center – large museum complex in a historic train station
  • Great American Ball Park – home of the Cincinnati Reds
  • Smale Riverfront Park – scenic park along the Ohio River
  • Cincinnati Art Museum – features a large collection of artworks
  • Eden Park – offers views, gardens, and walking paths
  • Findlay Market – historic public market with local vendors and food

Distance from Hamilton County to Nearby Cities

  • Hamilton County to Columbus – 105 mi (169 km)
  • Hamilton County to Dayton – 50 mi (80 km)
  • Hamilton County to Louisville – 100 mi (161 km)
  • Hamilton County to Indianapolis – 110 mi (177 km)
  • Hamilton County to Lexington – 85 mi (137 km)

FAQs about Hamilton County

Where is Hamilton County located?

Hamilton County is located in southwestern Ohio along the Ohio River.

What is Hamilton County known for?

It is known for Cincinnati, its riverfront, cultural attractions, and professional sports teams.

What is the population of Hamilton County?

The population was 830,639 according to the 2020 Census.

What is the largest city in Hamilton County?

Cincinnati is the largest city and also the county seat.

Are there major attractions in Hamilton County?

Yes, the county has major attractions including the Cincinnati Zoo, museums, and riverfront parks.