County ZIP codes · Missouri · FIPS 29167
Polk County, MO ZIP Codes
Polk County, Missouri has 19 ZIP codes (Census 2020 ZCTA-county file; GeoNames postal codes, October 2026): 18 residential and 1 for PO boxes or a single organization. 10 of the residential ones lie mainly in Polk County and 8 mainly in a neighboring county; 14 cross the county line. Median household income ranges from $41,447 in 65724 (Pittsburg) to $86,850 in 65648 (Fair Grove) (Census Bureau, ACS 2020-2024).
- ACS2020-24
- Census2020
Where are the ZIP codes of Polk County?
Source: U.S. Census Bureau, 2020 ZCTA cartographic boundaries; ACS 2020-2024 5-year estimates (B19013).
How different are its ZIP codes?
The middle half of its ranked ZIP codes (1,000+ people living in households) report median household incomes between $50,194 and $77,406.
They carry 18 postal town names.
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B19013).
All 18 residential ZIP codes in Polk County
10 ZIP codes lie mainly in Polk County; 8 more reach into it from a neighboring county and follow the first table.
| In this county | ||||||
|---|---|---|---|---|---|---|
| 65613 | Bolivar | 17,666 | 96 | $59k | $213k | 100% |
| 65674 | Humansville | 2,896 | 30 | $48k | $137k | 43% |
| 65663 | Half Way | 2,700 | 24 | $61k | $211k | 100% |
| 65725 | Pleasant Hope | 2,501 | 80 | $77k | $205k | 62% |
| 65649 | Fair Play | 1,932 | 29 | $47k | $314k | 54% |
| 65617 | Brighton | 1,716 | 53 | $77k | $209k | 64% |
| 65710 | Morrisville | 1,589 | 52 | $78k | $231k | 100% |
| 65640 | Dunnegan | 1,530 | 39 | $61k | $172k | 74% |
| 65601 | Aldrich | 572 | 11 | $47k | $167k | 66% |
| 65727 | Polk | 101 | 10 | $82k | $233k | 99% |
Partly in Polk County
| In this county | ||||||
|---|---|---|---|---|---|---|
| 65650 | Flemington | 1,454 | 19 | $50k | $120k | 47% |
| 65770 | Walnut Grove | 2,599 | 27 | $59k | $189k | 38% |
| 65685 | Louisburg | 794 | 22 | $51k | $169k | 20% |
| 65781 | Willard | 9,692 | 135 | $84k | $235k | 10% |
| 65622 | Buffalo | 8,695 | 57 | $50k | $174k | 10% |
| 65724 | Pittsburg | 1,563 | 68 | $41k | $174k | 9% |
| 65648 | Fair Grove | 5,861 | 75 | $87k | $247k | 7% |
| 65767 | Urbana | 1,983 | 25 | $53k | $201k | 4% |
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates; county shares by land area (Census 2020 ZCTA-county relationship file).
Which ZIP codes cross the county line?
15 ZIP codes of Polk County extend into another county. A ZIP code follows mail routes, not county borders.
| ZIP | In Polk | Elsewhere |
|---|---|---|
| 65781 | 10% | Greene County 90% |
| 65622 | 10% | Dallas County 90% |
| 65648 | 7% | Greene County 58%; Dallas County 26%; Webster County 8% |
| 65674 | 43% | Cedar County 38%; Hickory County 11%; St. Clair County 8% |
| 65770 | 38% | Greene County 49%; Dade County 14% |
| 65725 | 62% | Greene County 38% |
| 65767 | 4% | Dallas County 67%; Hickory County 29% |
| 65649 | 54% | Cedar County 46% |
| 65617 | 64% | Greene County 36% |
| 65724 | 9% | Hickory County 91% |
| 65640 | 74% | Cedar County 26% |
| 65650 | 47% | Hickory County 53% |
| 65685 | 20% | Dallas County 80% |
| 65601 | 66% | Dade County 33% |
| 65727 | 99% |
Source: U.S. Census Bureau, 2020 ZCTA-county relationship file (shares of land area).
PO Box and single-organization ZIP codes
| ZIP | Postal name |
|---|---|
| 65645 | Eudora |
Source: GeoNames postal codes (CC BY 4.0).
Which first three digits do Polk County's ZIP codes use?
The first three digits of a ZIP code name the sectional center, the mail processing plant that sorts it. Polk County's ZIP codes use 2 prefixes: 656 and 657.
Source: U.S. Postal Service, labeling list L005 (3-digit ZIP Code prefix groups, SCF sortation), effective October 1, 2026.