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Brown County, IL
4 cities and towns and 3 ZIP codes in Brown County, Illinois.
Population
6,322
Land area
306sq mi
People per sq mi
21
ZIP codes
3
Cities and towns in Brown County
Brown County at a glance
- Brown County is 91% less dense than Illinois as a whole.
- Households here earn a median of $67,917 a year, 19% less than the Illinois figure of $83,390.
- A typical owner-occupied home is valued at $150,300 (43% below Illinois) and median rent is $698 a month.
- The biggest population centers are Mount Sterling (1,980), Versailles (441) and Mound Station (150).
Local data for Brown County, IL
Counts from official public data
Housing and community stats
Brown County, IL, American Community Survey 2020-2024
Median household income
$67,917
Poverty rate
9.2%
Median home value
$150,300
Prices +8.3% in a year
Median rent
$698/mo
Homeownership
71.8%
Bachelor's or higher
12.6%
Median age
41.0
Average commute
15.9 min
Largest reported origins and ancestries: German Americans (1,143), Irish Americans (558), Mexican Americans (269).
Economy and federal money
Jobs, income, federal spending and pandemic loans
Unemployment rate
2.6%
Aug 2026, -0.6 pts in a year
Average annual pay
$69,099
4,825 jobs, 2025
Income per person
$49,932
BEA, 2024
Federal spending
$30.23M
FY 2026, $4,842 per person
PPP loans
$10.57M
327 loans, 1,172 jobs reported
Campaign donations
$26.58K
Itemized, 2026 cycle
How people get to work
Brown County, IL, workers 16 and older. American Community Survey 5-year estimates
- Drove alone80.8%
- Carpooled7.7%
- Public transit0.1%
- Walked3.5%
- Bicycle0.0%
- Taxi, ride-hailing, motorcycle or other0.6%
- Worked from home7.3%
Average one-way commute: 15.9 minutes for people who do not work from home.
Environment and hazard risk
Brown County, IL, from FEMA, NOAA and EPA
Natural hazard risk
Very Low
Top: landslide
Storm events since 1996
236
Most often thunderstorm wind
Flood insurance policies
4
0.2% of homes, county
July high / Jan low
87° / 18°F
39.1 inches of rain a year
Health statistics
Share of adults in Brown County, IL, CDC PLACES estimates
Obesity
41.5%
U.S. 33.3% +8.2 pts
Diabetes
11.7%
U.S. 12.1% about the same
Smoking
17.8%
U.S. 12.8% +5.0 pts
Uninsured (18-64)
12.1%
U.S. 11.1% +1.0 pts
Cities, towns and ZIP codes in Brown County
Population shown
Frequently asked questions
- What is the largest city in Brown County, IL?
- Mount Sterling is the largest city or town in Brown County, with about 1,980 residents.
- How many ZIP codes are in Brown County?
- Brown County includes 3 ZIP Code Tabulation Areas, including 62353, 62375, 62378.
- What is the population of Brown County, IL?
- About 6,322 people live in Brown County, based on American Community Survey 5-year estimates.
- What counties border Brown County?
- Brown County borders Adams County, Morgan County, Pike County, Cass County, Schuyler County.
Source: U.S. Census Bureau (TIGER/Line boundaries, American Community Survey) · Data as of 12/31/2023