Every ZIP code in the United States, with weather, radar, trivia and the numbers behind it. Five digits since 1963!

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zipcodes.pro — STATE/MO/COUNTY/ST-CLAIR

St. Clair County, MO ZIP codes

St. Clair County, MO has 6 ZIP codes, in 6 towns: 64776, 64724, 64763, 64738, 64780 and 64781. 1 more crosses into it from a neighbouring county: 64744.

The county seat is Osceola.

ZIP codes
6
Partly in it
1 more
Towns
6
County seat
Osceola
County FIPS
29185
Population
9,587
Median household income
$53,043
Land area
675 sq mi

St. Clair County ZIP codes by town

Osceola (county seat)
64776

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.

ZIP codes partly in St. Clair County

This ZIP code lies mostly in a neighbouring county but covers a twentieth or more of St. Clair County.

Map of St. Clair County ZIP codes

647246473864763647766478064781

The ZIP codes of St. Clair 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.

St. Clair County in numbers

About 9,587 people live in St. Clair County, in 4,071 households, the 88th most populous of Missouri's 115 counties. The median household income is $53,043 a year, 25% below the Missouri median of $70,702 (US: $80,734). The median owner-occupied home is valued at $157,100 (32% below the Missouri median), and median gross rent is $622 a month. The median age is 46.1; 14.7% of adults 25 and over hold a bachelor's degree or higher (32.4% across Missouri); the average commute takes 28 minutes.

Population9,587St. Clair9,587
Households4,071St. Clair4,071
Median age46.1St. Clair46.1Missouri39.0US 38.9
Median household income$53,043St. Clair$53,043Missouri$70,702US $80,734
Median home value$157,100St. Clair$157,100Missouri$230,300US $332,700
Median gross rent$622St. Clair$622Missouri$1,033US $1,413
Bachelor's degree or higher14.7%St. Clair14.7%Missouri32.4%US 35.7%
Mean commute28.4 minSt. Clair28.4 minMissouri23.5 minUS 26.4 min
Population density14 / sq miSt. Clair14 / 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 St. Clair County

Largest towns in St. Clair County
TownZIP codesPopulation
Appleton City 1 1,221
Osceola 1 1,042
Lowry City 1 618
Rockville 1 153
Roscoe 1 101
Collins 1 76

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 St. Clair County.

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

Every ZIP code in St. Clair County, with figures

ZIP codes in St. Clair County
ZIP City Type Population Median income Median home
64724 Appleton City , MO Standard 1,999 $49,338 $115,600
64738 Collins , MO Standard 1,368 $61,493 $211,700
64763 Lowry City , MO Standard 1,676 $54,821 $151,300
64776 Osceola , MO Standard 3,374 $44,880 $149,100
64780 Rockville , MO Standard 364 $44,107 $108,100
64781 Roscoe , MO Standard 80 $43,056 —

Cite this page

zipcodes.pro. “St. Clair County ZIP codes.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/state/mo/county/st-clair

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