Map of Piatt County, Illinois

Piatt County is a county in Illinois. According to the 2020 United States Census, it had a population of 16,673. Its county seat is Monticello.

Piatt County is part of the ChampaignUrbana, IL Metropolitan Statistical Area.

Piatt County overview:
Name:Piatt County
FIPS code:17-147
State:Illinois
Founded:1841
Named for:James A. Piatt
Seat:Monticello
Largest city:Monticello
Total Area:439 sq mi (1,140 km²)
Land Area:439 sq mi (1,140 km²)
Total Population:16,673
Population Density:38/sq mi (15/km²)
Time zone:UTC−6 (Central)
Summer Time Zone (DST):UTC−5 (CDT)
Website:www.piattcounty.org

Piatt County location map. Where is Piatt County?

Piatt County location on the U.S. Map. Where is Piatt County.
Location of Piatt County in the the United States.
Piatt County location on the Illinois map. Where is Piatt County.
Location of Piatt County in Illinois.

History

The first settler was George Haworth, a Quaker, followed by James Martin, Abraham Hanline, Solomon Carter and William Cordell.

Piatt County was formed in 1841 from Macon and Dewitt counties. Two local residents, James A. Piatt and Jesse Warner, were instrumental in forming the county. It was named after James A. Piatt after winning a coin flip against Jesse Warner.

Abraham Lincoln practiced law in Piatt County as a circuit lawyer. Lincoln and Stephen A. Douglas planned their presidential debates in Piatt County in 1858, one of which is ornamented by a marker just south of Monticello.

The first courthouse was built in 1843. It was replaced by the current courthouse in 1904.

Piatt County Road Map

Piatt CountyStreet Map.
Street map of Piatt County, Illinois. Source: OpenStreetMap (OSM)
Piatt CountyMap
Piatt Countypolitical map.

Geography

According to the US Census Bureau, the county has a total area of 439 square miles (1,140 km), of which 439 square miles (1,140 km) is land and 0.3 square miles (0.78 km) (0.06%) is water.

Climate and weather

In recent years, average temperatures in the county seat of Monticello have ranged from a low of 14 °F (−10 °C) in January to a high of 85 °F (29 °C) in July, although a record low of −25 °F (−32 °C) was recorded in January 1999 and a record high of 105 °F (41 °C) was recorded in July 1966. Average monthly precipitation ranged from 1.61 inches (41 mm) in January to 3.99 inches (101 mm) in August.

Major highways

  • Interstate 72
  • Interstate 74
  • U.S. Route 36
  • U.S. Route 150
  • Illinois Route 10
  • Illinois Route 32
  • Illinois Route 48
  • Illinois Route 105

Adjacent counties

Piatt County Topographic Map

Topographic Map of Piatt County, Illinois
Piatt County Topo map.

Piatt County Satellite Map

Satellite Map of Piatt County, Illinois
Piatt County satellite map.

Piatt County Outline Map

Outline Map of Piatt County, Illinois
Piatt County outline map.
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Parent Unit Map

Map of United States
The United States (US) covers a total area of 9,833,520 sq. km. Of this area, the 48 contiguous states and the District of Columbia cover 8,080,470 sq. km. The archipelago of Hawaii has an area of 28,311 sq. km while the remaining area is part of the US territories. The greatest east-west distance in the ... Read more
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Political map of Illinois State – Printable Collection
Illinois (/ˌɪlɪˈnɔɪ/ (listen) IL-ə-NOY) is a state in the Midwestern United States. It shares borders with Wisconsin to its north, Iowa to its northwest, Missouri to its southwest, Kentucky to its south, and Indiana to its east. Its largest metropolitan areas include the Chicago metropolitan area, and the Metro East section, of Greater St. Louis. ... Read more
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Related Administrative Divisions

Sub-Administrative Units Maps