71 zips
| Zip Code | City | Population ↓ |
|---|---|---|
| 6082 | Enfield | 41,100 |
| 6106 | Hartford | 37,809 |
| 6040 | Manchester | 36,171 |
| 6053 | New Britain | 35,697 |
| 6489 | Southington | 32,444 |
| 6111 | Newington | 30,551 |
| 6066 | Vernon Rockville | 30,377 |
| 6051 | New Britain | 29,421 |
| 6095 | Windsor | 29,367 |
| 6033 | Glastonbury | 29,311 |
| 6109 | Wethersfield | 27,180 |
| 6074 | South Windsor | 26,820 |
| 6118 | East Hartford | 26,771 |
| 6114 | Hartford | 25,283 |
| 6108 | East Hartford | 24,027 |
| 6042 | Manchester | 23,302 |
| 6112 | Hartford | 21,918 |
| 6002 | Bloomfield | 21,547 |
| 6067 | Rocky Hill | 20,716 |
| 6107 | West Hartford | 20,423 |
| 6001 | Avon | 19,157 |
| 6037 | Berlin | 18,754 |
| 6105 | Hartford | 18,660 |
| 6032 | Farmington | 18,642 |
| 6062 | Plainville | 17,499 |
| 6029 | Ellington | 16,571 |
| 6117 | West Hartford | 15,863 |
| 6070 | Simsbury | 15,353 |
| 6119 | West Hartford | 15,011 |
| 6084 | Tolland | 14,685 |
| 6120 | Hartford | 13,832 |
| 6096 | Windsor Locks | 12,555 |
| 6110 | West Hartford | 12,307 |
| 6238 | Coventry | 12,267 |
| 6076 | Stafford Springs | 11,989 |
| 6268 | Storrs Mansfield | 10,782 |
| 6078 | Suffield | 10,751 |
| 6071 | Somers | 10,554 |
| 6479 | Plantsville | 10,192 |
| 6019 | Canton | 9,735 |
| 6052 | New Britain | 8,232 |
| 6035 | Granby | 7,939 |
| 6085 | Unionville | 7,521 |
| 6016 | Broad Brook | 6,833 |
| 6269 | Storrs Mansfield | 6,723 |
| 6447 | Marlborough | 6,106 |
| 6073 | South Glastonbury | 5,825 |
| 6279 | Willington | 5,563 |
| 6248 | Hebron | 5,464 |
| 6237 | Columbia | 5,268 |
| 6026 | East Granby | 5,176 |
| 6043 | Bolton | 4,848 |
| 6250 | Mansfield Center | 4,780 |
| 6088 | East Windsor | 4,324 |
| 6092 | West Simsbury | 4,239 |
| 6093 | West Suffield | 3,894 |
| 6231 | Amston | 3,645 |
| 6089 | Weatogue | 3,548 |
| 6232 | Andover | 3,148 |
| 6103 | Hartford | 2,845 |
| 6060 | North Granby | 2,290 |
| 6081 | Tariffville | 1,607 |
| 6023 | East Berlin | 1,464 |
| 6080 | Suffield | 991 |
| 6090 | West Granby | 829 |
| 6467 | Milldale | 570 |
| 6059 | North Canton | 344 |
| 6444 | Marion | 261 |
| 6022 | Collinsville | 29 |
| 6072 | Somersville | 0 |
| 6020 | Canton Center | 0 |
The data shown reflect ZCTAs from the US Census. As of 2024, there are 71 ZCTAs in Capitol Planning Region, Connecticut (US Census).