Brown County, Illinois
Brown County, Illinois, has 6,401 residents (July 2025 estimate). Its county seat is Mount Sterling. It uses Central Time and covers 306 sq mi (792 km²) of land.
- Resident population, July 2025
- 6,401
- Land area
- 306 sq mi (792 km²)
- County seat or government
- Mount Sterling
- Time zone
- Central TimeUTC-06:00 in January; UTC-05:00 in July
- Median household income
- $67,917 ± $7,581
- Median home value
- $150,300 ± $16,538
- Median rent, with utilities
- $698 ± $227
- Homes lived in by their owners
- 71.8% ± 4.0 points
- County type
- County
- Metro or micro area
- Outside any metro or micro areaNext to: Jacksonville, IL micro area and Quincy, IL-MO micro area
- Water area
- 1.6 sq mi (4.14 km²)
- State
- Illinois
- County code (FIPS)
- 17009
- Coordinates (central point)
- 39.962069, -90.750309
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 Brown 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
5 ZIP Code areas overlap Brown 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 Brown County, largest first
- Mount Sterling Township4,157 people
- Versailles Township821 people
- Missouri Township324 people
- Lee Township312 people
- Elkhorn Township213 people
- Buckhorn Township188 people
- Cooperstown Township184 people
- Ripley Township110 people
- Pea Ridge Township13 people
People counts are American Community Survey 2020–2024 5-year estimates. All townships in Illinois, by county
School districts in Brown County, largest first
- Brown County Community Unit School District 16,307 people
- Meredosia-Chambersburg Community Unit School District 111,351 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.
- Mount Sterling, Illinois (city)1,980 people
- Versailles, Illinois (village)441 people
- Mound Station, Illinois (village)150 people
- Ripley, Illinois (village)87 people
Bordering areas, nearest first
Distances are straight lines between map points.
- Schuyler County, Illinois15 mi northeast
- Adams County, Illinois24 mi west
- Pike County, Illinois24 mi south
- Cass County, Illinois27 mi east
- Morgan County, Illinois33 mi southeast
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