16 zips
| Zip Code | City | Population ↓ |
|---|---|---|
| 55125 | Saint Paul | 45,835 |
| 55016 | Cottage Grove | 38,842 |
| 55082 | Stillwater | 36,154 |
| 55129 | Saint Paul | 29,714 |
| 55128 | Saint Paul | 28,811 |
| 55038 | Hugo | 23,764 |
| 55042 | Lake Elmo | 12,647 |
| 55115 | Saint Paul | 8,815 |
| 55071 | Saint Paul Park | 5,895 |
| 55055 | Newport | 4,163 |
| 55073 | Scandia | 4,061 |
| 55003 | Bayport | 3,902 |
| 55043 | Lakeland | 3,540 |
| 55001 | Afton | 2,974 |
| 55047 | Marine On Saint Croix | 2,296 |
| 55090 | Willernie | 376 |
The data shown reflect ZCTAs from the US Census. As of 2024, there are 16 ZCTAs in Washington County, Minnesota (US Census).