Blog · October 14, 2026 · Illinois
Mercer County Township Map in Illinois
Civil and survey townships in Mercer County, with the free map, starting near Alexis.
Main page: Mercer County, IL GIS & Parcel Viewer (official map link, Mercer County facts and neighboring maps).
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A Mercer County township map search near Alexis frequently starts with a tax bill or a deed that names a township. Here's how to see township lines for Mercer County, Illinois, on free official maps.
How to use the Mercer County township map
The named townships on a county map are civil townships, and a parcel near Aledo belongs to exactly one of them. The survey township cited in deeds near Aledo comes from the Public Land Survey System, with blocks roughly 6 miles on a side, split into 36 sections of about 640 acres.
Finding the tract on the Mercer County map
For land around New Boston, open the Sidwell Portico; it is the map Mercer County itself publishes. The Mercer County site lists a disclaimer before the map; click through to reach parcels near Keithsburg. Most people locate their Mercer County tract fastest by searching an address in New Boston, then clicking the outline. For a backup route to the map covering New Boston, our Mercer County directory entry keeps the link current.
How to look up a township in Mercer County
Open the Sidwell Portico and look in the layer list for township or municipal boundaries; click a parcel near Joy and the record frequently names the township. For the survey grid, look for section, township and range in the legal description on the Mercer County record.
Sections, quarters and roads in Mercer County
On a grid map of Mercer County, sections are numbered from 1 in the northeast corner, with the count snaking back and forth to 36 in the southeast. Calls like 'NE 1/4 of the SW 1/4' near Keithsburg are read from the end: locate the last quarter named first, then work inward. Water, old surveys and corrections can leave odd-sized lots along section edges in Mercer County.
Deeds, districts and roads
Township names on a historical atlas of Mercer County can help when a family deed near Keithsburg uses an old place name. Election maps, school districts and fire districts in Mercer County do not always follow township lines near Keithsburg, so check each one separately.
What drives land use around Aledo
County Business Patterns counted 269 business establishments in Mercer County for 2022, led by other services, construction, and retail trade. Compared with national shares, Mercer County leans toward utilities and fabricated metal product manufacturing, which shapes demand for land near Keithsburg.
Getting oriented in Mercer County, IL
From Aledo, the seat of the county, the map spreads out to Keithsburg, New Boston, Alexis, and Joy. Smaller places such as Cable, Eliza, and Hamlet appear on the Mercer County map as little clusters of lots. Roughly 561 square miles of land and about 15,487 residents (2023 estimate) make up Mercer County. Outside Matherville, most of the county map is farm, ranch or timber ground with large, irregular tracts.
Tracts that cross the Mercer County line
Near the edge of the county, check the next map over: Henderson County, Henry County, Knox County, Rock Island County, and Warren County all border it. Every map bordering Mercer County is listed on our Illinois directory.
Where Mercer County land records are kept
For land near North Henderson, the deed itself lives in the county recording office, and the map is an index to it. Copy the parcel ID and legal description from the county record before you request a deed for land near Matherville.
Mailing towns vs. townships near Aledo
Township lines near Joy affect tax bills, local permits and voting precincts, so check the record before assuming. Buyers looking near Joy sometimes locate the township office is the place to ask about local road plans and ordinances.
Mercer County, IL: common questions
Which township is my house near Alexis in?
Click the parcel on the Sidwell Portico; the Mercer County record most frequently names the township.
Can I see township boundaries near North Henderson online?
Usually; turn on boundary layers in the county viewer and zoom toward North Henderson.
What is a boundary survey township in Mercer County?
It's a Public Land Survey System block about 6 miles square with 36 sections, used to describe Mercer County land.
Why is my mailing address in Alexis but my township different?
Postal service areas around Alexis cross township lines, so the two frequently differ.
How many acres is a section in Mercer County?
A standard section is about 640 acres, so a quarter section near North Henderson is about 160, though corrections make some smaller.
Open the official Mercer County, IL parcel map Mercer County in the Platbookmapper directory
Not a survey. County GIS and tax parcel maps are assessment and planning layers. They are not a substitute for a recorded plat, deed, or licensed survey, especially for fences, setbacks, or boundary disputes.