Blog · October 14, 2026 · Illinois
The Washington County Township Map: an Illinois guide
Civil and survey townships in Washington County, with the free map, starting near Centralia.
Main page: Washington County, IL GIS & Parcel Viewer (official map link, Washington County facts and neighboring maps).
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A Washington County township map search near Irvington often starts with a tax bill or a deed that names a township. Here's how to see township lines for Washington County, Illinois, on free official maps.
What a Washington County township map displays
Where civil townships exist in the county, they are named local units, and their duties near Irvington depend on Illinois law. The survey township cited in deeds near Du Bois comes from the Public Land Survey System, with blocks roughly 6 miles on a side, split into 36 sections of about 640 acres.
The county map you'll pair it with
For land around Irvington, open the Sidwell Portico - Washington County IL (Sidwell's Portico platform); it's the map Washington County itself publishes. Click any Washington County parcel near Centralia to open its record: owner, parcel ID and assessed acreage are most often listed. Bookmark our Washington County page too; it tracks the official Illinois link if it moves and lists the maps around Centralia.
How to look up a township in Washington County
On the Sidwell Portico - Washington County IL, the parcel record for a piece of ground near Du Bois most often lists the township, and many viewers draw township lines as a layer. Some Washington County viewers include a PLSS layer that labels sections, which helps when a deed near Irvington cites T and R numbers.
How the survey grid is numbered
Near Ashley, numbering starts with section 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 Ashley make sense in reverse: the final quarter listed is the largest piece. Correction lines and irregular sections exist, so a section near Du Bois may not be exactly 640 acres.
Township records near Du Bois
Township names on a historical atlas of Washington County can help when a family deed near Centralia uses an old place name. Election maps, school districts and fire districts in Washington County don't always follow township lines near Centralia, so check each one separately.
What drives land use around Nashville
County Business Patterns counted 375 business establishments in Washington County for 2022, led by retail trade, other services, and construction. Compared with national shares, Washington County leans toward wholesale of nondurable goods (including farm products), which shapes demand for land near Addieville.
Washington County at a glance
From Nashville, the seat of the county, the map spreads out to Ashley, Centralia, Addieville, and Du Bois. Smaller places such as Beaucoup, Clarmin, and Cordes appear on the Washington County map as little clusters of lots. Roughly 563 square miles of land and about 13,536 residents (2023 estimate) make up Washington County. Outside Nashville, most of the county map is farm, ranch or timber ground with large, irregular tracts.
Near the Washington County line
A farm near the county line can carry separate records in Clinton County, Jefferson County, and Marion County as well. Every map bordering Washington County is listed on our Illinois directory.
Recorded documents in Washington County, Illinois
For land near Nashville, the deed itself lives in the county recording office, and the map is an index to it. Easements and access rights near Du Bois live in recorded documents, so read the deed, not just the county map.
Taxes, permits and township lines
Township lines near Irvington decide which local office you deal with, so look it up well before you call about land near Elkton. Buyers looking near Irvington sometimes find the township office is the place to ask about local road plans and ordinances.
Washington County, IL: common questions
Can I see township boundaries near Irvington online?
Usually; turn on boundary layers in the county viewer and zoom toward Irvington.
How big is a quarter section near Irvington?
A standard section is about 640 acres, so a quarter section near Irvington is about 160, although corrections make some smaller.
What do township and range mean on a deed near Du Bois?
It's a Public Land Survey System block about 6 miles square with 36 sections, used to describe Washington County land.
Why is my mailing address in Du Bois but my township different?
Postal towns and township lines in Washington County don't always match; the parcel record displays the township for taxes.
Open the official Washington County, IL parcel map Washington 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.