Montgomery County, Illinois
Montgomery County, Illinois, has 28,076 residents (July 2025 estimate). Its county seat is Hillsboro. It uses Central Time and covers 704 sq mi (1,823 km²) of land.
- Resident population, July 2025
- 28,076
- Land area
- 704 sq mi (1,823 km²)
- County seat or government
- Hillsboro
- Time zone
- Central TimeUTC-06:00 in January; UTC-05:00 in July
- Median household income
- $63,620 ± $4,881
- Median home value
- $112,300 ± $7,660
- Median rent, with utilities
- $723 ± $37
- Homes lived in by their owners
- 77.4% ± 2.4 points
- County type
- County
- Metro or micro area
- Outside any metro or micro areaNext to: Taylorville, IL micro area, Springfield, IL metro area, and St. Louis, MO-IL metro area
- Water area
- 5.97 sq mi (15.5 km²)
- State
- Illinois
- County code (FIPS)
- 17135
- Coordinates (central point)
- 39.228068, -89.478141
These coordinates mark a central point for the area, not a street address. Income, home value, rent and homes lived in by their owners: U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates, ± margin at 90% confidence; checked on October 13, 2026.
Time zones in Montgomery County
| Time zone | Local time and UTC offset | Next clock change |
|---|---|---|
| Central TimeAmerica/Chicago | UTC-06:00 in January; UTC-05:00 in July. Enable JavaScript for the live clock. | Enable JavaScript for upcoming changes. |
Near a time-zone line, check where you are with the time-zone finder. Your phone’s setting can differ.
ZIP Code areas, largest first
- 620568,528 people
- 620497,871 people
- 625576,878 people
- 626903,838 people
- 625583,639 people
- 626403,391 people
- 620753,330 people
- 620803,255 people
- 620692,897 people
- 625461,521 people
- 625601,446 people
- 620861,318 people
All 28
28 ZIP Code areas overlap Montgomery County. People counts are 2020–2024 estimates for each whole ZIP area. Mailing ZIPs can differ; check an address with USPS ZIP Code Lookup.
Official county information
We don’t have a website for this county yet. The US government’s local-office directory ↗ lists its offices. A geographic lookup cannot determine eligibility, tax liability or a court obligation.
Townships in Montgomery County, largest first
- Hillsboro Township6,875 people
- North Litchfield Township4,875 people
- South Litchfield Township3,260 people
- Nokomis Township2,779 people
- East Fork Township2,133 people
- Witt Township1,164 people
- Raymond Township1,113 people
- Bois D'Arc Township904 people
- Fillmore Consolidated Township857 people
- Butler Grove Township799 people
- Irving Township747 people
- Grisham Township559 people
All 18
- Zanesville Township416 people
- Pitman Township374 people
- Audubon Township354 people
- Walshville Township317 people
- Harvel Township264 people
- Rountree Township152 people
People counts are American Community Survey 2020–2024 5-year estimates. All townships in Illinois, by county
School districts in Montgomery County, largest first
- Highland Community Unit School District 518,542 people
- Bond County Community Unit School District 212,956 people
- Hillsboro Community Unit School District 312,441 people
- Vandalia Community Unit School District 20311,578 people
- Litchfield Community Unit School District 128,625 people
- Pana Community Unit School District 88,413 people
- North Mac Community Unit School District 347,864 people
- Auburn Community Unit School District 106,678 people
- Nokomis Community Unit School District 224,131 people
- Pawnee Community Unit School District 113,280 people
- Mount Olive Community Unit School District 53,076 people
- Ramsey Community Unit School District 2043,073 people
All 14
- Panhandle Community Unit School District 22,941 people
- Morrisonville Community Unit School District 11,886 people
Districts with land in the county; a district can cross county lines. People counts are American Community Survey 2020–2024 5-year estimates. A district boundary doesn’t decide which school a student attends.
Cities, towns and communities, largest first
These areas overlap the mapped boundary; an overlap does not mean that every address belongs to both.
- Litchfield, Illinois (city)6,834 people
- Hillsboro, Illinois (city)5,803 people
- Nokomis, Illinois (city)2,147 people
- Raymond, Illinois (village)1,030 people
- Witt, Illinois (city)875 people
- Farmersville, Illinois (village)763 people
- Taylor Springs, Illinois (village)633 people
- Coffeen, Illinois (city)592 people
- Schram City, Illinois (village)578 people
- Panama, Illinois (village)420 people
- Coalton, Illinois (village)357 people
- Irving, Illinois (village)355 people
All 20
- Fillmore, Illinois (village)241 people
- Harvel, Illinois (village)201 people
- Butler, Illinois (village)194 people
- Waggoner, Illinois (village)169 people
- Walshville, Illinois (village)158 people
- Donnellson, Illinois (village)129 people
- Ohlman, Illinois (village)59 people
- Wenonah, Illinois (village)29 people
Bordering areas, nearest first
Distances are straight lines between map points.
- Bond County, Illinois24 mi south
- Macoupin County, Illinois24 mi west
- Christian County, Illinois24 mi northeast
- Fayette County, Illinois29 mi southeast
- Madison County, Illinois36 mi southwest
- Sangamon County, Illinois38 mi north
- Shelby County, Illinois38 mi east
Before using this answer on a form
Use a precise point for address-level questions. A device accuracy circle can cross a boundary; confirm tax, voting or jury details with the responsible office.
Find the county where you are now, check its ZIP area, or check the time zone where you are.
Areas that only touch the edge
These areas meet the boundary only along a sliver. Most addresses here are not in them; for an address near the line, check with the county.