26 ZIP Codes
| Zip Code | City | Population ↓ |
|---|---|---|
| 12180 | Troy | 53,479 |
| 12144 | Rensselaer | 22,111 |
| 12182 | Troy | 14,867 |
| 12061 | East Greenbush | 9,854 |
| 12033 | Castleton On Hudson | 7,932 |
| 12018 | Averill Park | 7,422 |
| 12198 | Wynantskill | 6,796 |
| 12090 | Hoosick Falls | 5,482 |
| 12123 | Nassau | 4,457 |
| 12196 | West Sand Lake | 3,880 |
| 12154 | Schaghticoke | 2,777 |
| 12138 | Petersburg | 2,695 |
| 12094 | Johnsonville | 2,656 |
| 12121 | Melrose | 2,280 |
| 12052 | Cropseyville | 1,915 |
| 12168 | Stephentown | 1,752 |
| 12185 | Valley Falls | 1,709 |
| 12062 | East Nassau | 1,650 |
| 12140 | Poestenkill | 1,512 |
| 12022 | Berlin | 1,120 |
| 12156 | Schodack Landing | 808 |
| 12153 | Sand Lake | 669 |
| 12063 | East Schodack | 665 |
| 12169 | Stephentown | 417 |
| 12040 | Cherry Plain | 27 |
| 12082 | Grafton | 2 |
The data shown reflect ZCTAs from the US Census. As of 2025, there are 26 ZCTAs in Rensselaer County, New York (US Census).