21 ZIP Codes
| Zip Code | City | Population ↓ |
|---|---|---|
| 53818 | Platteville | 16,024 |
| 53813 | Lancaster | 6,222 |
| 53805 | Boscobel | 5,554 |
| 53809 | Fennimore | 4,748 |
| 53807 | Cuba City | 4,209 |
| 53811 | Hazel Green | 3,093 |
| 53573 | Muscoda | 2,906 |
| 53820 | Potosi | 2,467 |
| 53806 | Cassville | 1,514 |
| 53804 | Bloomington | 1,275 |
| 53554 | Livingston | 1,029 |
| 53801 | Bagley | 998 |
| 53569 | Montfort | 978 |
| 53808 | Dickeyville | 905 |
| 53816 | Mount Hope | 856 |
| 53827 | Woodman | 429 |
| 53810 | Glen Haven | 389 |
| 53825 | Stitzer | 358 |
| 53812 | Kieler | 254 |
| 53817 | Patch Grove | 227 |
| 53802 | Beetown | 132 |
The data shown reflect ZCTAs from the US Census. As of 2025, there are 21 ZCTAs in Grant County, Wisconsin (US Census).