Information on the FIPS county code, county seat, year of establishment, origin, etymology, population, area and map of each county is included in the table below.

Jan 4, 2026 · Coverage includes all counties in Illinois, including county name map labels on an interactive searchable Illinois county map depicting county boundary lines. Also, the page …

Jan 13, 2025 · The U.S. state of Illinois is divided into 102 Counties. Explore the Illinois County Map, all Counties list along with their County Seats in alphabetical order and their population, …

This Map of Counties and County Seats in Illinois shows state borders, state names, Lake Michigan, state capital city, county borders, county names and county seats.

There are 102 counties in the State of Illinois. The Illinois Statutes provide for three types of county government: counties under township organization (83), counties under commission …

Illinois Counties: cities, maps, physical & cultural features, population & income data.

This interactive map and search tools allow you to explore Illinois counties in depth, including detailed information on cities, towns, and ZIP codes within each county.

Below is a detailed table of selected Illinois counties with county seats, established dates, area size, and notable towns. Notes: County establishment years and area figures are taken from …

There are 102 Counties in the State of Illinois. Springfield, the state Capital is located in Sangamon County.

Alphabetical list of counties in Illinois. Demographics and population of Illinois counties.