71 zips
| Zip Code | City | Population ↓ |
|---|---|---|
| 6082 | Enfield | 41,346 |
| 6106 | Hartford | 38,511 |
| 6040 | Manchester | 36,847 |
| 6053 | New Britain | 34,405 |
| 6489 | Southington | 32,924 |
| 6051 | New Britain | 31,711 |
| 6111 | Newington | 30,458 |
| 6066 | Vernon Rockville | 30,289 |
| 6095 | Windsor | 29,445 |
| 6033 | Glastonbury | 29,251 |
| 6109 | Wethersfield | 27,192 |
| 6074 | South Windsor | 26,805 |
| 6118 | East Hartford | 26,784 |
| 6114 | Hartford | 26,077 |
| 6108 | East Hartford | 24,158 |
| 6042 | Manchester | 22,663 |
| 6112 | Hartford | 21,977 |
| 6002 | Bloomfield | 21,460 |
| 6107 | West Hartford | 20,717 |
| 6067 | Rocky Hill | 20,705 |
| 6001 | Avon | 19,119 |
| 6105 | Hartford | 19,002 |
| 6037 | Berlin | 18,573 |
| 6032 | Farmington | 18,540 |
| 6062 | Plainville | 17,537 |
| 6029 | Ellington | 16,519 |
| 6117 | West Hartford | 15,726 |
| 6070 | Simsbury | 15,023 |
| 6084 | Tolland | 14,640 |
| 6119 | West Hartford | 14,592 |
| 6120 | Hartford | 13,479 |
| 6268 | Storrs Mansfield | 12,961 |
| 6110 | West Hartford | 12,813 |
| 6096 | Windsor Locks | 12,563 |
| 6238 | Coventry | 12,254 |
| 6076 | Stafford Springs | 11,949 |
| 6078 | Suffield | 10,633 |
| 6071 | Somers | 10,495 |
| 6479 | Plantsville | 9,947 |
| 6019 | Canton | 9,782 |
| 6269 | Storrs Mansfield | 8,863 |
| 6052 | New Britain | 8,207 |
| 6035 | Granby | 7,810 |
| 6085 | Unionville | 7,537 |
| 6016 | Broad Brook | 6,677 |
| 6250 | Mansfield Center | 6,304 |
| 6447 | Marlborough | 6,134 |
| 6073 | South Glastonbury | 5,854 |
| 6279 | Willington | 5,586 |
| 6248 | Hebron | 5,388 |
| 6237 | Columbia | 5,280 |
| 6026 | East Granby | 5,154 |
| 6043 | Bolton | 4,851 |
| 6088 | East Windsor | 4,503 |
| 6092 | West Simsbury | 4,400 |
| 6231 | Amston | 3,739 |
| 6093 | West Suffield | 3,711 |
| 6089 | Weatogue | 3,391 |
| 6232 | Andover | 3,160 |
| 6103 | Hartford | 2,419 |
| 6060 | North Granby | 2,331 |
| 6081 | Tariffville | 1,803 |
| 6023 | East Berlin | 1,576 |
| 6080 | Suffield | 1,332 |
| 6090 | West Granby | 875 |
| 6467 | Milldale | 396 |
| 6444 | Marion | 245 |
| 6059 | North Canton | 229 |
| 6022 | Collinsville | 76 |
| 6020 | Canton Center | 38 |
| 6072 | Somersville | 0 |
The data shown reflect ZCTAs from the US Census. As of 2024, there are 71 ZCTAs in Capitol Planning Region, Connecticut (US Census).