Find Illinois county and township maps.
Mercer County, Illinois
Find your Illinois County by searching for your address, or by clicking on the map.
Mercer County, Illinois Map
An detailed map of Mercer County. Click on a nearby County to view more information about that County.
Map of Townships in Mercer County, Illinois
An interactive map of county subdivisions in Mercer County. In Illinois, that can include Townships, Precincts, and Villages. Find what township you are in now.
Map of Counties in Illinois
An interactive map of Counties in Illinois. Click on a County to view more information about that County.
About Mercer County, Illinois
Mercer County is a county in Illinois. According to the 2020 census, it had a population of 15,699. Its county seat is Aledo.
What is this?
This site has an interactive map of Illinois Counties. Click on the map to find your Illinois county, and view more details. You can also search for your address and use your GPS to find your Illinois County.
Find what County you are in, and see official Illinois County resources and information. Find any county in the United Stated, along with resources and links to official County websites. See a County map and local details. Looking for what county you are currently in? Find out on this map or use your device GPS to see what county you are in.