| ZIP Codes: | 20 ZIP Codes (16 Standard, 4 PO Box, 0 Unique) [See All] |
| Area Code: | 207 |
| Timezone: | Eastern (GMT -05:00) |
| Local Time: | 2:12:29 PM |
| Population: | 41,003 [See All] |
| FIPS: | 23013 |
| Land Area: | 390 sq mi |
| Water Area: | 145 sq mi |
| Coordinates: | 44.0949, -69.1219 |
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41,003 residents live across 20 ZIPs covering 390 sq mi, served by 20 distinct USPS-recognized cities.
Population moved from 39,653 to 41,003 from 2014 to 2024 — a +3.4% change. 13 ZIPs gained residents, 6 lost.
The county's wealthiest ZIP 04855 (Port Clyde , $250,001 median) and poorest ZIP 04861 (Thomaston, $56,435) are 12.4 miles apart — a 4.4× income gap across local geography.
Median home values vary 2.7× across this county — from $195,200 in 04574 (Washington) to $520,600 in 04843 (Camden).
Density varies 14× across the county — from 39 people/sq mi in 04853 (North Haven) to 536 in 04841 (Rockland).
Educational attainment ranges from 17.3% bachelor's+ in 04574 (Washington) to 85.3% in 04855 (Port Clyde ) — the breadth of educational profiles across the area.
Within Maine, this is the #10 most populous of 16 counties and ranks #4 for median household income .
Weighted by population, the typical household earns about $75,294 across the county — reflecting what a typical resident sees, not a simple ZIP average.
39.7% of adults age 25+ hold a bachelor's degree or higher (12,553 of 31,595 reporting).
16 Standard delivery, 4 PO Box only, 0 single-entity Unique ZIPs serve this county.
1 ZIP in this county where more than 60% of adults 25+ hold a bachelor's degree — typically college campuses, research enclaves, or tech corridors.
Median household income spans 4.4× 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 |
|---|---|---|---|---|---|---|
| 04841 | Rockland | Standard | 7,035 | $56,533 | 13.1 | -2.8% |
| 04843 | Camden | Standard | 5,242 | $82,344 | 19.5 | 8.3% |
| 04864 | Warren | Standard | 4,932 | $74,616 | 48.9 | 4.6% |
| 04862 | Union | Standard | 4,023 | $73,536 | 66.5 | 12.5% |
| 04856 | Rockport | Standard | 3,675 | $86,979 | 22.7 | 10.1% |
| 04861 | Thomaston | Standard | 2,769 | $56,435 | 11.4 | 0.0% |
| 04847 | Hope | Standard | 1,748 | $86,766 | 24.3 | 5.9% |
| 04574 | Washington | Standard | 1,624 | $59,861 | 39.2 | 12.2% |
| 04860 | Tenants Harbor | Standard | 1,543 | $86,833 | 23.7 | -16.6% |
| 04854 | Owls Head | Standard | 1,482 | $87,325 | 10.8 | -11.2% |
| 04563 | Cushing | Standard | 1,460 | $83,500 | 23.8 | 3.2% |
| 04858 | South Thomaston | Standard | 1,378 | $87,059 | 13.8 | -6.7% |
| 04863 | Vinalhaven | Standard | 1,216 | $72,963 | 25.8 | -8.4% |
| 04547 | Friendship | Standard | 1,213 | $75,625 | 14.1 | 14.8% |
| 04859 | Spruce Head | Standard | 753 | $75,341 | 5.0 | 77.6% |
| 04853 | North Haven | Standard | 480 | $87,500 | 12.3 | 17.1% |
| 04855 | Port Clyde | PO Box | 313 | $250,001 | 0.0 | -8.2% |
| 04645 | Isle Au Haut | PO Box | 69 | $49,500 | 12.8 | 13.1% |
| 04851 | Matinicus | PO Box | 48 | $65,417 | 2.4 | 2.1% |
| 04865 | West Rockport | PO Box | — | — | 0.0 | — |