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zipcodes.pro — STATE/IL/COUNTY/BROWN

Brown County, IL ZIP codes

Brown County, IL has 3 ZIP codes, in 3 towns: 62353, 62378 and 62375.

The county seat is Mount Sterling.

ZIP codes
3
Towns
3
County seat
Mount Sterling
County FIPS
17009
Population
6,322
Median household income
$67,917
Land area
306 sq mi

Brown County ZIP codes by town

Mount Sterling (county seat)
62353

Each ZIP code is listed under the county most of its land lies in and the town the Postal Service names it for; a ZIP code's own page shows exactly how it is split.

Map of Brown County ZIP codes

623536237562378

The ZIP codes of Brown County, shaded. Outlines are Census ZIP Code Tabulation Areas (2020), which approximate the mail routes; PO-box and single-address codes have no area and are not drawn. Click any area to open its ZIP code.

Brown County in numbers

About 6,322 people live in Brown County, in 2,041 households, the 91st most populous of Illinois's 102 counties. The median household income is $67,917 a year, 19% below the Illinois median of $83,390 (US: $80,734). The median owner-occupied home is valued at $150,300 (43% below the Illinois median), and median gross rent is $698 a month. The median age is 41.0; 12.6% of adults 25 and over hold a bachelor's degree or higher (37.8% across Illinois); the average commute takes 16 minutes.

Population6,322Brown6,322
Households2,041Brown2,041
Median age41.0Brown41.0Illinois39.0US 38.9
Median household income$67,917Brown$67,917Illinois$83,390US $80,734
Median home value$150,300Brown$150,300Illinois$263,300US $332,700
Median gross rent$698Brown$698Illinois$1,274US $1,413
Bachelor's degree or higher12.6%Brown12.6%Illinois37.8%US 35.7%
Mean commute15.9 minBrown15.9 minIllinois27.8 minUS 26.4 min
Population density21 / sq miBrown21 / sq mi

U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates. Survey estimates carry margins of error, wider for small places. Sources and methods.

Largest towns in Brown County

Largest towns in Brown County
TownZIP codesPopulation
Mount Sterling 1 1,980
Versailles 1 441
Timewell 1 383

Population of the census place of that name where there is one, otherwise of the ZIP codes the Postal Service addresses by it. A town's ZIP codes can reach past the county line.

Neighbouring counties

Counties that share a ZIP code with Brown County.

Not sure you are in Brown County? What county am I in? answers from your location, near a county line included.

Every ZIP code in Brown County, with figures

ZIP codes in Brown County
ZIP City Type Population Median income Median home
62353 Mount Sterling , IL Standard 5,066 $66,000 $152,100
62375 Timewell , IL Standard 383 $76,855 $140,800
62378 Versailles , IL Standard 863 $69,650 $151,400

Cite this page

zipcodes.pro. “Brown County ZIP codes.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/state/il/county/brown

Underlying data is public domain or openly licensed — sources, vintages and licences.