Knox County, Maine ZIP codes
20 ZIP codes are in Knox County.
- ZIP codes
- 20
- Population in these ZIPs
- 41,003
- Avg. median income
- $75,300population-weighted
- Cities & towns
- 20
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ZIP codes in Knox County
| ZIP code | City | Population | Median income | Typical home value |
|---|---|---|---|---|
| 04547 | Friendship | 1,213 | $75,625 | $382,100 |
| 04563 | Cushing | 1,460 | $83,500 | $482,400 |
| 04574 | Washington | 1,624 | $59,861 | $344,900 |
| 04645 | Isle Au Haut | 69 | $49,500 | $593,800 |
| 04841 | Rockland | 7,035 | $56,533 | $342,400 |
| 04843 | Camden | 5,242 | $82,344 | $694,900 |
| 04847 | Hope | 1,748 | $86,766 | $394,100 |
| 04851 | Matinicus | 48 | $65,417 | $350,000 |
| 04853 | North Haven | 480 | $87,500 | $752,500 |
| 04854 | Owls Head | 1,482 | $87,325 | $491,400 |
| 04855 | Port Clyde | 313 | $250,001 | $358,100 |
| 04856 | Rockport | 3,675 | $86,979 | $588,400 |
| 04858 | South Thomaston | 1,378 | $87,059 | $466,400 |
| 04859 | Spruce Head | 753 | $75,341 | — |
| 04860 | Tenants Harbor | 1,543 | $86,833 | $515,100 |
| 04861 | Thomaston | 2,769 | $56,435 | $340,100 |
| 04862 | Union | 4,023 | $73,536 | $385,800 |
| 04863 | Vinalhaven | 1,216 | $72,963 | $457,500 |
| 04864 | Warren | 4,932 | $74,616 | $341,800 |
| 04865 PO Box | West Rockport | — | — | — |
Population and median household income: ACS 2020–2024 5-year estimates. Typical home value: Zillow Home Value Index (September 2026) where available, otherwise the ACS median owner-reported value. "PO Box" marks ZIP codes with no delivery area of their own. Methodology
Cities and towns in Knox County
Nearby counties
Frequently asked questions
How many ZIP codes are in Knox County, Maine?
20 ZIP codes are mainly in Knox County.
What cities are in Knox County?
ZIP codes in Knox County use the city names Camden, Cushing, Friendship, Hope, Isle Au Haut, Matinicus, North Haven, Owls Head, Port Clyde, Rockland, Rockport and South Thomaston and others.