Illinois Counties - Cities, Towns, Neighborhoods, Maps & Data


There are 102 counties in Illinois. All counties are functioning governmental units; each is governed by a board with between 5 and 29 members.

There are 1,710 county subdivisions in Illinois known as minor civil divisions (MCDs); 85 counties have functioning, but not necessarily active, townships and 17 counties have nonfunctioning election precincts. There are 1,432 townships and 274 election precincts. Chicago city is independent of any MCD and serves as an MCD equivalent in two counties, creating two county subdivisions. There are also two undefined MCDs that cover the Illinois portion of Lake Michigan. Alexander, Calhoun, Edwards, Hardin, Johnson, Massac, Menard, Monroe, Morgan, Perry, Pope, Pulaski, Randolph, Scott, Union, Wabash, and Williamson counties have election precincts. All other counties have townships. The governing body for each township is an elected township supervisor and a board of trustees.

Illinois Counties - Populated Places in 102 Counties

Also see County: Census Data | Physical, Cultural & Historical Features | ZIP Codes | Land, Farms, & Ranches


Illinois Counties Synopsis

The Illinois Counties section of the gazetteer lists the cities, towns, neighborhoods and subdivisions for each of the 102 Illinois Counties.

Also see Illinois County: ZIP Codes | Physical, Cultural & Historical Features | Census Data | Land, Farms, & Ranches

Nearby physical features such as streams, islands and lakes are listed along with maps and driving directions. The same is true for both historical features and cultural features such as hospitals, parks, schools and airports.

Each profile includes the current weather plus a seven day forecast. Note that for smaller populated places, the weather report may be for the nearest weather reporting station or airport.

The local information and data include economic and demographic data, census information and facts about the local environmental situation including such items as maps of flood zones, local sources of pollution, air quality indices and local areas where hazardous materials may be used or stored.

The complete category list for larger cities and towns includes: Arts & Culture, Census Data, Community Organizations, State and Local Government, Health & Medical, Newcomer Information, Local News Papers & Radio, Parks & Recreation, Pets & Hobbies, Schools & Libraries, Social Services, Travel and Tourism.