Osage County, MO ZIP codes
There are 8 ZIP codes in Osage County, MO, in 8 towns, from 65016 to 65085. The largest are 65051 (Linn), 65035 (Freeburg) and 65085 (Westphalia). 2 more cross into it from neighbouring counties: 65013 and 65014.
The county seat is Linn.
- ZIP codes
- 8
- Partly in it
- 2 more
- Towns
- 8
- County seat
- Linn
- County FIPS
29151- State
- Missouri
- Population
- 13,402
- Median household income
- $76,681
- Land area
- 607 sq mi
- Metro area
- Jefferson City
Osage County ZIP codes by town
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 Osage County
These ZIP codes lie mostly in a neighbouring county but each cover a twentieth or more of Osage County.
- 65013 Belle · mostly in Maries County
- 65014 Bland · mostly in Gasconade County
Map of Osage County ZIP codes
The ZIP codes of Osage 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.
Osage County in numbers
About 13,402 people live in Osage County, in 5,287 households, the 73rd most populous of Missouri's 115 counties. The median household income is $76,681 a year, 8% above the Missouri median of $70,702 (US: $80,734). The median owner-occupied home is valued at $223,300 (3% below the Missouri median), and median gross rent is $639 a month. The median age is 41.1; 24.7% of adults 25 and over hold a bachelor's degree or higher (32.4% across Missouri); the average commute takes 26 minutes.
| Population | 13,402 |
|---|---|
| Households | 5,287 |
| Median age | 41.1 |
| Median household income | $76,681 |
| Median home value | $223,300 |
| Median gross rent | $639 |
| Bachelor's degree or higher | 24.7% |
| Mean commute | 26.4 min |
| Population density | 22 / 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 Osage County
| Town | ZIP codes | Population |
|---|---|---|
| Bonnots Mill | 1 | 1,240 |
| Linn | 1 | 1,197 |
| Loose Creek | 1 | 893 |
| Westphalia | 1 | 415 |
| Freeburg | 1 | 401 |
| Chamois | 1 | 375 |
| Koeltztown | 1 | 194 |
| Mount Sterling | 1 | 20 |
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 Osage County.
Not sure you are in Osage County? What county am I in? answers from your location, near a county line included.
Every ZIP code in Osage County, with figures
| ZIP | City | Type | Population | Median income | Median home |
|---|---|---|---|---|---|
65016 | Bonnots Mill , MO | Standard | 1,240 | $78,750 | $269,400 |
65024 | Chamois , MO | Standard | 1,218 | $68,438 | $161,600 |
65035 | Freeburg , MO | Standard | 1,681 | $90,815 | $237,300 |
65048 | Koeltztown , MO | Standard | 194 | $88,750 | $370,000 |
65051 | Linn , MO | Standard | 4,487 | $53,289 | $191,200 |
65054 | Loose Creek , MO | Standard | 893 | — | $200,700 |
65062 | Mount Sterling , MO | Standard | 20 | — | — |
65085 | Westphalia , MO | Standard | 1,193 | $103,563 | $290,600 |
Cite this page
zipcodes.pro. “Osage County ZIP codes.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/state/mo/county/osage
Underlying data is public domain or openly licensed — sources, vintages and licences.