21 zips
| Zip Code | City | Population ↓ |
|---|---|---|
| 53818 | Platteville | 15,843 |
| 53813 | Lancaster | 6,139 |
| 53805 | Boscobel | 5,569 |
| 53809 | Fennimore | 4,701 |
| 53807 | Cuba City | 4,298 |
| 53811 | Hazel Green | 3,064 |
| 53573 | Muscoda | 2,924 |
| 53820 | Potosi | 2,472 |
| 53806 | Cassville | 1,573 |
| 53804 | Bloomington | 1,294 |
| 53801 | Bagley | 1,033 |
| 53554 | Livingston | 972 |
| 53808 | Dickeyville | 934 |
| 53569 | Montfort | 924 |
| 53816 | Mount Hope | 871 |
| 53825 | Stitzer | 407 |
| 53827 | Woodman | 398 |
| 53810 | Glen Haven | 362 |
| 53812 | Kieler | 256 |
| 53817 | Patch Grove | 212 |
| 53802 | Beetown | 142 |
The data shown reflect ZCTAs from the US Census. As of 2024, there are 21 ZCTAs in Grant County, Wisconsin (US Census).