| ZIP Codes: | 52 ZIP Codes (37 Standard, 10 PO Box, 5 Unique) [See All] |
| Area Code: | 207 |
| Timezone: | Eastern (GMT -05:00) |
| Local Time: | 2:12:29 PM |
| Population: | 309,364 [See All] |
| FIPS: | 23005 |
| CBSA: | Portland-South Portland, ME |
| Land Area: | 959 sq mi |
| Water Area: | 243 sq mi |
| Coordinates: | 43.7827, -70.3196 |
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309,364 residents live across 52 ZIPs covering 959 sq mi, served by 39 distinct USPS-recognized cities.
Population moved from 284,698 to 309,364 from 2014 to 2024 — a +8.7% change. 31 ZIPs gained residents, 7 lost.
The county's wealthiest ZIP 04110 (Cumberland Foreside, $194,205 median) and poorest ZIP 04040 (Harrison, $57,218) are 39.6 miles apart — a 3.4× income gap across local geography.
Median home values vary 3.6× across this county — from $256,300 in 04040 (Harrison) to $923,600 in 04110 (Cumberland Foreside).
Density varies 216× across the county — from 42 people/sq mi in 04029 (Sebago) to 9,100 in 04101 (Portland).
Educational attainment ranges from 23.2% bachelor's+ in 04085 (Steep Falls) to 76.6% in 04110 (Cumberland Foreside) — the breadth of educational profiles across the area.
Within Maine, this is the #1 most populous of 16 counties and ranks #1 for median household income with the #2 fastest decade growth .
Hosts 4 single-entity Unique ZIPs: 04124Union Mutual Life Ins ; 04123Union Mutual Life Ins ; 04122Union Mutual Life Ins ; and 04034Ll Bean Co .
Weighted by population, the typical household earns about $100,413 across the county — reflecting what a typical resident sees, not a simple ZIP average.
53.0% of adults age 25+ hold a bachelor's degree or higher (120,686 of 227,815 reporting).
37 Standard delivery, 10 PO Box only, 5 single-entity Unique ZIPs serve this county.
6 ZIPs in this county where more than 60% of adults 25+ hold a bachelor's degree — typically college campuses, research enclaves, or tech corridors.
5 ZIP codes in this county serve a single facility — typically theme parks, universities, large corporations, airports, or government complexes.
Median household income spans 3.4× between the wealthiest and poorest ZIPs — a sign of significant intra-county inequality.
| ZIP | City | Type | Population | Median Income | Area (sq mi) | 10-yr Growth |
|---|---|---|---|---|---|---|
| 04103 | Portland | Standard | 32,024 | $89,796 | 10.2 | 6.0% |
| 04106 | South Portland | Standard | 27,019 | $86,188 | 12.9 | 6.5% |
| 04074 | Scarborough | Standard | 23,076 | $135,018 | 49.0 | 20.8% |
| 04011 | Brunswick | Standard | 22,336 | $74,952 | 50.0 | 9.9% |
| 04092 | Westbrook | Standard | 20,775 | $85,038 | 17.4 | 17.6% |
| 04062 | Windham | Standard | 19,188 | $107,934 | 50.3 | 10.9% |
| 04101 | Portland | Standard | 18,431 | $63,880 | 2.0 | 8.7% |
| 04038 | Gorham | Standard | 18,300 | $112,312 | 51.5 | 9.7% |
| 04102 | Portland | Standard | 17,267 | $82,751 | 6.6 | -4.7% |
| 04105 | Falmouth | Standard | 12,755 | $150,919 | 30.7 | 11.7% |
| 04107 | Cape Elizabeth | Standard | 9,656 | $146,054 | 15.1 | 7.5% |
| 04096 | Yarmouth | Standard | 9,053 | $110,216 | 13.8 | 7.4% |
| 04032 | Freeport | Standard | 8,802 | $107,326 | 36.6 | 9.4% |
| 04039 | Gray | Standard | 8,102 | $95,125 | 43.6 | 7.5% |
| 04084 | Standish | Standard | 7,900 | $109,345 | 67.2 | 0.3% |
| 04021 | Cumberland Center | Standard | 6,990 | $172,468 | 20.7 | 16.9% |
| 04260 | New Gloucester | Standard | 5,766 | $108,797 | 47.8 | 3.1% |
| 04009 | Bridgton | Standard | 5,478 | $78,021 | 65.1 | 4.8% |
| 04071 | Raymond | Standard | 4,971 | $88,722 | 47.2 | 1.6% |
| 04097 | North Yarmouth | Standard | 4,240 | $129,267 | 21.4 | 16.3% |
| 04079 | Harpswell | Standard | 4,026 | $91,969 | 22.6 | 4.6% |
| 04055 | Naples | Standard | 3,985 | $78,188 | 36.8 | 5.2% |
| 04015 | Casco | Standard | 3,696 | $69,313 | 37.9 | -4.3% |
| 04040 | Harrison | Standard | 3,050 | $57,218 | 66.6 | -2.5% |
| 04085 | Steep Falls | Standard | 2,762 | $92,246 | 15.6 | 33.9% |
| 04029 | Sebago | Standard | 2,086 | $77,813 | 49.4 | 30.1% |
| 04069 | Pownal | Standard | 1,696 | $104,333 | 22.6 | 13.7% |
| 04110 | Cumberland Foreside | Standard | 1,657 | $194,205 | 2.2 | 21.7% |
| 04066 | Orrs Island | Standard | 837 | $115,547 | 1.8 | 80.8% |
| 04108 | Peaks Island | Standard | 826 | $94,318 | 1.2 | -9.5% |
| 04091 | West Baldwin | Standard | 801 | $78,750 | 19.1 | -12.0% |
| 04017 | Chebeague Island | Standard | 555 | $67,639 | 3.0 | 28.8% |
| 04024 | East Baldwin | Standard | 356 | $52,917 | 16.2 | -40.8% |
| 04050 | Long Island | Standard | 249 | $91,250 | 1.3 | 4.2% |
| 04109 | Portland | Standard | 213 | — | 1.1 | 79.0% |
| 04003 | Bailey Island | Standard | 183 | $96,250 | 1.1 | -60.9% |
| 04057 | North Bridgton | PO Box | 164 | — | 0.0 | 300.0% |
| 04019 | Cliff Island | PO Box | 93 | $89,712 | 0.6 | — |
| 04098 | Westbrook | PO Box | — | — | 0.0 | — |
| 04070 | Scarborough | PO Box | — | — | 0.0 | — |
| 04116 | South Portland | PO Box | — | — | 0.0 | — |
| 04124 | Portland | Unique | — | — | 0.0 | — |
| 04123 | Portland | Unique | — | — | 0.0 | — |
| 04122 | Portland | Unique | — | — | 0.0 | — |
| 04104 | Portland | PO Box | — | — | 0.0 | — |
| 04112 | Portland | PO Box | — | — | 0.0 | — |
| 04082 | South Windham | PO Box | — | — | 0.0 | — |
| 04034 | Freeport | Unique | — | — | 0.0 | — |
| 04033 | Freeport | Unique | — | — | 0.0 | — |
| 04078 | South Freeport | PO Box | — | — | 0.0 | — |
| 04013 | Bustins Island | Standard | — | — | 0.2 | — |
| 04077 | South Casco | PO Box | — | — | 0.0 | — |