Andrew County, MO ZIP codes
There are 10 ZIP codes in Andrew County, MO, in 10 towns, from 64421 to 64505. The largest are 64505 (Saint Joseph), 64485 (Savannah) and 64494 (Union Star).
The county seat is Savannah.
- ZIP codes
- 10
- Towns
- 10
- County seat
- Savannah
- County FIPS
29003- State
- Missouri
- Population
- 18,065
- Median household income
- $75,625
- Land area
- 433 sq mi
- Metro area
- St. Joseph
Andrew 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.
Map of Andrew County ZIP codes
The ZIP codes of Andrew 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.
Andrew County in numbers
About 18,065 people live in Andrew County, in 6,988 households, the 60th most populous of Missouri's 115 counties. The median household income is $75,625 a year, 7% above the Missouri median of $70,702 (US: $80,734). The median owner-occupied home is valued at $215,400 (6% below the Missouri median), and median gross rent is $961 a month. The median age is 42.5; 28.8% of adults 25 and over hold a bachelor's degree or higher (32.4% across Missouri); the average commute takes 22 minutes.
| Population | 18,065 |
|---|---|
| Households | 6,988 |
| Median age | 42.5 |
| Median household income | $75,625 |
| Median home value | $215,400 |
| Median gross rent | $961 |
| Bachelor's degree or higher | 28.8% |
| Mean commute | 21.5 min |
| Population density | 42 / 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 Andrew County
| Town | ZIP codes | Population |
|---|---|---|
| St. Joseph | 1 | 71,236 |
| Savannah | 1 | 5,053 |
| Union Star | 1 | 559 |
| Helena | 1 | 507 |
| Fillmore | 1 | 299 |
| Amazonia | 1 | 286 |
| Bolckow | 1 | 197 |
| Cosby | 1 | 130 |
| Rosendale | 1 | 130 |
| Rea | 1 | 39 |
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 Andrew County.
Not sure you are in Andrew County? What county am I in? answers from your location, near a county line included.
Every ZIP code in Andrew County, with figures
| ZIP | City | Type | Population | Median income | Median home |
|---|---|---|---|---|---|
64421 | Amazonia , MO | Standard | 817 | $53,125 | $90,000 |
64427 | Bolckow , MO | Standard | 582 | $62,917 | $208,700 |
64436 | Cosby , MO | Standard | 873 | $113,500 | $253,800 |
64449 | Fillmore , MO | Standard | 491 | $71,667 | $89,200 |
64459 | Helena , MO | Standard | 507 | $78,808 | $170,900 |
64480 | Rea , MO | Standard | 329 | $115,781 | $256,700 |
64483 | Rosendale , MO | Standard | 591 | $73,750 | $188,600 |
64485 | Savannah , MO | Standard | 7,998 | $67,929 | $199,700 |
64494 | Union Star , MO | Standard | 1,163 | $65,511 | $144,200 |
64505 | Saint Joseph , MO | Standard | 14,107 | $73,298 | $191,100 |
Cite this page
zipcodes.pro. “Andrew County ZIP codes.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/state/mo/county/andrew
Underlying data is public domain or openly licensed — sources, vintages and licences.