38 zips
| Zip Code | City | Population ↓ |
|---|---|---|
| 4103 | Portland | 31,705 |
| 4106 | South Portland | 26,966 |
| 4074 | Scarborough | 22,527 |
| 4011 | Brunswick | 22,081 |
| 4092 | Westbrook | 20,484 |
| 4062 | Windham | 19,041 |
| 4038 | Gorham | 18,192 |
| 4101 | Portland | 18,128 |
| 4102 | Portland | 17,642 |
| 4105 | Falmouth | 12,557 |
| 4107 | Cape Elizabeth | 9,581 |
| 4096 | Yarmouth | 9,006 |
| 4032 | Freeport | 8,736 |
| 4039 | Gray | 8,004 |
| 4084 | Standish | 7,695 |
| 4021 | Cumberland Center | 6,629 |
| 4260 | New Gloucester | 5,733 |
| 4009 | Bridgton | 5,357 |
| 4071 | Raymond | 4,922 |
| 4097 | North Yarmouth | 4,173 |
| 4079 | Harpswell | 4,094 |
| 4055 | Naples | 3,949 |
| 4015 | Casco | 3,656 |
| 4040 | Harrison | 2,963 |
| 4085 | Steep Falls | 2,822 |
| 4029 | Sebago | 2,124 |
| 4110 | Cumberland Foreside | 1,917 |
| 4069 | Pownal | 1,551 |
| 4066 | Orrs Island | 845 |
| 4108 | Peaks Island | 788 |
| 4091 | West Baldwin | 751 |
| 4017 | Chebeague Island | 568 |
| 4024 | East Baldwin | 414 |
| 4050 | Long Island | 300 |
| 4109 | Portland | 188 |
| 4057 | North Bridgton | 180 |
| 4003 | Bailey Island | 90 |
| 4019 | Cliff Island | 54 |
The data shown reflect ZCTAs from the US Census. As of 2024, there are 38 ZCTAs in Cumberland County, Maine (US Census).