Piatt County Map, Illinois

Written and Fact-checked by | Updated On: April 26, 2026 | 14:30 ET

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

Piatt County Map, Illinois

Piatt County Map, Illinois

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

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Piatt County, Illinois

Piatt County is a county located in the U.S. state of Illinois. It's county seat is Monticello. As per 2020 census, the population of Piatt County is 16753 people and population density is square miles. According to the United States Census Bureau, the county has a total area of 439 sq mi (1,137 km2). Piatt County was established on 1841.

Facts about Piatt County, Illinois

CountryUnited States
StateIllinois
RegionCentral Illinois
County SeatMonticello
Named AfterJohn Piatt
Established1841
Organized1841
Coordinates40.01° N, 88.59° W
Total Area~439 sq mi
Land Area~439 sq mi
Water Area<1 sq mi
Population (2020)~16,729
Population RankSmall county in Illinois
Largest CityMonticello
Main IndustriesAgriculture, Manufacturing, Healthcare
Major HighwaysInterstate 72, Illinois Route 47
Time ZoneCentral Time (UTC−06:00)
Known ForAllerton Park & Retreat Center, rural farmland
Websitehttps://www.piattcounty.org

Ctities in Piatt county

City NameTypePopulation (2020)Pop. DensityArea
AtwoodVillage1,1161,817.6/sq mi (701.8/km2)0.614 sq mi (1.59 km2)
BementVillage1,4841,907.5/sq mi (736.5/km2)0.778 sq mi (2.02 km2)
Cerro GordoVillage1,3161,805.2/sq mi (697.0/km2)0.729 sq mi (1.89 km2)
CiscoVillage2541,395.6/sq mi (538.8/km2)0.182 sq mi (0.47 km2)
De LandVillage4471,054.2/sq mi (407.0/km2)0.424 sq mi (1.1 km2)
HammondVillage508671.1/sq mi (259.1/km2)0.757 sq mi (1.96 km2)
MansfieldVillage9281,826.8/sq mi (705.3/km2)0.508 sq mi (1.32 km2)
MonticelloCity5,9411,542.3/sq mi (595.5/km2)3.852 sq mi (9.98 km2)

Roads and Highways in Piatt County, Illinois

Piatt County is connected by several highways that provide access to central Illinois and nearby cities.

  • Interstate 72 – runs east-west through the county, connecting Monticello to Champaign and Decatur
  • Illinois Route 47 – runs north-south, linking Monticello to Mahomet and Gibson City
  • Illinois Route 105 – runs east-west, connecting Bement to Monticello and Cerro Gordo
  • Illinois Route 10 – runs east-west nearby, linking the county to Lincoln and Decatur

Neighboring Counties of Piatt County

  • DeWitt County (west)
  • Macon County (southwest)
  • Moultrie County (south)
  • Douglas County (east)
  • Champaign County (northeast)
  • McLean County (north)

Top Attractions in Piatt County, Illinois

Piatt County offers small-town charm, parks, and scenic outdoor spaces centered around Monticello.

  • Allerton Park and Retreat Center – A historic estate with gardens, trails, and sculptures.
  • Monticello Railway Museum – Offers train rides and exhibits on railroad history.
  • Lodge Park – A scenic park with trails and picnic areas along the Sangamon River.
  • Monticello Downtown Area – Features shops, dining, and historic architecture.
  • Piatt County Courthouse – A historic landmark located in Monticello.
  • Railroad Prairie Nature Preserve – Offers walking trails and native prairie landscapes.
  • Piatt County Fairgrounds – Hosts fairs and community events.

Distance from Piatt County to Nearby Cities

  • Monticello to Champaign – 20 mi (32 km)
  • Monticello to Decatur – 25 mi (40 km)
  • Monticello to Bloomington – 50 mi (80 km)
  • Monticello to Springfield – 70 mi (113 km)
  • Monticello to Chicago – 150 mi (241 km)

FAQs about Piatt County

Where is Piatt County located?

Piatt County is located in central Illinois, centered around the city of Monticello.

What is Piatt County known for?

The county is known for Allerton Park, scenic landscapes, and its quiet rural communities.

What is the county seat of Piatt County?

Monticello is the county seat and the largest city in Piatt County.

Are there outdoor activities in Piatt County?

Yes, visitors can enjoy parks, trails, gardens, and outdoor recreation throughout the county.

How can I reach Piatt County?

Piatt County is accessible via Interstate 72 and several Illinois state highways.