County ZIP codes · Wisconsin · FIPS 55097
Portage County, WI ZIP Codes
Portage County, Wisconsin has 22 ZIP codes (Census 2020 ZCTA-county file; GeoNames postal codes, October 2026): 21 residential and 1 for PO boxes or a single organization. 11 of the residential ones lie mainly in Portage County and 10 mainly in a neighboring county; 13 cross the county line. Median household income ranges from $59,545 in 54481 (Stevens Point) to $113,690 in 54423 (Custer) (Census Bureau, ACS 2020-2024).
- ACS2020-24
- Census2020
Where are the ZIP codes of Portage 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 $69,602 and $87,580.
They carry 20 postal town names.
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B19013).
All 21 residential ZIP codes in Portage County
11 ZIP codes lie mainly in Portage County; 10 more reach into it from a neighboring county and follow the first table.
| In this county | ||||||
|---|---|---|---|---|---|---|
| 54481 | Stevens Point | 28,242 | 431 | $60k | $201k | 100% |
| 54467 | Plover | 14,870 | 224 | $88k | $269k | 100% |
| 54482 | Stevens Point | 8,963 | 98 | $95k | $289k | 100% |
| 54406 | Amherst | 4,040 | 61 | $78k | $285k | 100% |
| 54473 | Rosholt | 2,472 | 29 | $80k | $245k | 76% |
| 54423 | Custer | 2,394 | 50 | $114k | $329k | 100% |
| 54443 | Junction City | 2,145 | 24 | $99k | $279k | 99% |
| 54909 | Almond | 1,982 | 21 | $80k | $196k | 82% |
| 54921 | Bancroft | 1,482 | 17 | $76k | $176k | 86% |
| 54407 | Amherst Junction | 1,350 | 29 | $102k | $324k | 100% |
| 54458 | Nelsonville | 133 | 299 | $58k | $150k | 100% |
Partly in Portage County
| In this county | ||||||
|---|---|---|---|---|---|---|
| 54494 | Wisconsin Rapids | 27,696 | 221 | $73k | $182k | 40% |
| 54966 | Plainfield | 2,202 | 27 | $67k | $156k | 19% |
| 54475 | Rudolph | 1,447 | 39 | $80k | $197k | 18% |
| 54977 | Scandinavia | 1,592 | 42 | $81k | $249k | 12% |
| 54455 | Mosinee | 19,025 | 81 | $96k | $251k | 7% |
| 54454 | Milladore | 1,215 | 27 | $83k | $170k | 5% |
| 54981 | Waupaca | 14,870 | 113 | $73k | $219k | 5% |
| 54984 | Wild Rose | 3,394 | 43 | $64k | $216k | 3% |
| 54499 | Wittenberg | 2,896 | 26 | $64k | $184k | 2% |
| 54945 | Iola | 3,470 | 32 | $70k | $217k | 2% |
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?
14 ZIP codes of Portage County extend into another county. A ZIP code follows mail routes, not county borders.
| ZIP | In Portage | Elsewhere |
|---|---|---|
| 54494 | 40% | Wood County 57%; Adams County 3% |
| 54455 | 7% | Marathon County 93% |
| 54981 | 5% | Waupaca County 91%; Waushara County 4% |
| 54945 | 2% | Waupaca County 99% |
| 54984 | 3% | Waushara County 97% |
| 54499 | 2% | Shawano County 69%; Marathon County 30% |
| 54473 | 76% | Marathon County 24% |
| 54966 | 19% | Waushara County 74%; Adams County 7% |
| 54443 | 99% | |
| 54909 | 82% | Waushara County 18% |
| 54977 | 12% | Waupaca County 88% |
| 54921 | 86% | Adams County 14% |
| 54475 | 18% | Wood County 82% |
| 54454 | 5% | Wood County 95% |
Source: U.S. Census Bureau, 2020 ZCTA-county relationship file (shares of land area).
PO Box and single-organization ZIP codes
| ZIP | Postal name |
|---|---|
| 54492 | Stevens Point |
Source: GeoNames postal codes (CC BY 4.0).
Which first three digits do Portage County's ZIP codes use?
The first three digits of a ZIP code name the sectional center, the mail processing plant that sorts it. Portage County's ZIP codes use 2 prefixes: 544 and 549.
Source: U.S. Postal Service, labeling list L005 (3-digit ZIP Code prefix groups, SCF sortation), effective October 1, 2026.