Washington County, Minnesota ZIP codes
17 ZIP codes are in Washington County, plus 3 that cross in from neighboring counties. It's part of the Minneapolis-St. Paul-Bloomington, MN-WI metro area.
- ZIP codes
- 17
- Population in these ZIPs
- 260,019
- Avg. median income
- $121,100population-weighted
- Cities & towns
- 13
Click anywhere on the map to see which ZIP code it's in.
ZIP codes in Washington County
| ZIP code | City | Population | Median income | Typical home value |
|---|---|---|---|---|
| 55001 | Afton | 3,027 | $133,581 | $722,900 |
| 55003 | Bayport | 3,905 | $125,893 | $439,500 |
| 55016 | Cottage Grove | 40,695 | $120,715 | $397,200 |
| 55038 | Hugo | 25,061 | $130,931 | $456,800 |
| 55042 | Lake Elmo | 13,705 | $154,341 | $640,400 |
| 55043 | Lakeland | 3,424 | $102,966 | $399,800 |
| 55047 | Marine On Saint Croix | 2,244 | $107,361 | $627,200 |
| 55055 | Newport | 4,754 | $71,979 | $348,100 |
| 55071 | Saint Paul Park | 5,719 | $100,798 | $316,700 |
| 55073 | Scandia | 4,169 | $128,723 | $547,400 |
| 55082 | Stillwater | 36,277 | $115,040 | $531,600 |
| 55083 PO Box | Stillwater | — | — | — |
| 55090 | Willernie | 401 | $85,119 | $301,700 |
| 55115 | Saint Paul | 8,949 | $124,234 | $507,500 |
| 55125 | Saint Paul | 44,185 | $119,260 | $412,600 |
| 55128 | Saint Paul | 29,384 | $93,210 | $356,200 |
| 55129 | Saint Paul | 34,120 | $143,795 | $543,300 |
ZIP codes partly in Washington County
These ZIP codes are mostly in a neighboring county but cover part of Washington County.
| ZIP code | City | County | Population | Median income | Typical home value |
|---|---|---|---|---|---|
| 55025 | Forest Lake | Anoka County | 25,891 | $98,382 | $438,900 |
| 55033 | Hastings | Dakota County | 29,674 | $103,988 | $384,100 |
| 55110 | Saint Paul | Ramsey County | 37,305 | $101,296 | $380,000 |
Population and median household income: ACS 2020–2024 5-year estimates. Typical home value: Zillow Home Value Index (September 2026) where available, otherwise the ACS median owner-reported value. "PO Box" marks ZIP codes with no delivery area of their own. Methodology
Cities and towns in Washington County
Nearby counties
Frequently asked questions
How many ZIP codes are in Washington County, Minnesota?
17 ZIP codes are mainly in Washington County, and 3 more ZIP codes from neighboring areas reach partly into it.
What cities are in Washington County?
ZIP codes in Washington County use the city names Afton, Bayport, Cottage Grove, Hugo, Lake Elmo, Lakeland, Marine On Saint Croix, Newport, Saint Paul, Saint Paul Park, Scandia and Stillwater and others.
What metro area is Washington County in?
Washington County is part of the Minneapolis-St. Paul-Bloomington, MN-WI metropolitan statistical area.