Knox County, ME ZIP codes
Knox County ZIP codes by town
Each ZIP code is listed under the county most of its land lies in and the town the Postal Service names it for; a ZIP code's own page shows exactly how it is split.
Map of Knox County ZIP codes
The ZIP codes of Knox County, shaded. Outlines are Census ZIP Code Tabulation Areas (2020), which approximate the mail routes; PO-box and single-address codes have no area and are not drawn. Click any area to open its ZIP code.
Knox County in numbers
About 41,003 people live in Knox County, in 18,484 households, the 10th most populous of Maine's 16 counties. The median household income is $74,096 a year, about the same as the Maine median of $74,733 (US: $80,734). The median owner-occupied home is valued at $324,900 (10% above the Maine median), and median gross rent is $1,165 a month. The median age is 49.5; 39.7% of adults 25 and over hold a bachelor's degree or higher (36.2% across Maine); the average commute takes 20 minutes.
| Population | 41,003 |
|---|---|
| Households | 18,484 |
| Median age | 49.5 |
| Median household income | $74,096 |
| Median home value | $324,900 |
| Median gross rent | $1,165 |
| Bachelor's degree or higher | 39.7% |
| Mean commute | 19.6 min |
| Population density | 112 / sq mi |
U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates. Survey estimates carry margins of error, wider for small places. Sources and methods.
Largest towns in Knox County
| Town | ZIP codes | Population |
|---|---|---|
| Rockland | 1 | 7,035 |
| Warren | 1 | 4,932 |
| Union | 1 | 4,023 |
| Camden | 1 | 3,682 |
| Rockport | 1 | 3,675 |
| Thomaston | 1 | 2,055 |
| Hope | 1 | 1,748 |
| Washington | 1 | 1,624 |
| Tenants Harbor | 1 | 1,543 |
| Owls Head | 1 | 1,482 |
| Cushing | 1 | 1,460 |
| South Thomaston | 1 | 1,378 |
| Vinalhaven | 1 | 1,216 |
| Friendship | 1 | 1,213 |
| Spruce Head | 1 | 753 |
Population of the census place of that name where there is one, otherwise of the ZIP codes the Postal Service addresses by it. A town's ZIP codes can reach past the county line.
Not sure you are in Knox County? What county am I in? answers from your location, near a county line included.
Every ZIP code in Knox County, with figures
| ZIP | City | Type | Population | Median income | Median home |
|---|---|---|---|---|---|
04547 | Friendship , ME | Standard | 1,213 | $75,625 | $275,000 |
04563 | Cushing , ME | Standard | 1,460 | $83,500 | $409,800 |
04574 | Washington , ME | Standard | 1,624 | $59,861 | $195,200 |
04645 | Isle Au Haut , ME | Standard | 69 | $49,500 | $593,800 |
04841 | Rockland , ME | Standard | 7,035 | $56,533 | $245,800 |
04843 | Camden , ME | Standard | 5,242 | $82,344 | $520,600 |
04847 | Hope , ME | Standard | 1,748 | $86,766 | $373,400 |
04851 | Matinicus , ME | Standard | 48 | $65,417 | $350,000 |
04853 | North Haven , ME | Standard | 480 | $87,500 | $440,200 |
04854 | Owls Head , ME | Standard | 1,482 | $87,325 | $413,300 |
04855 | Port Clyde , ME | Standard | 313 | $250,000+ | $358,100 |
04856 | Rockport , ME | Standard | 3,675 | $86,979 | $469,000 |
04858 | South Thomaston , ME | Standard | 1,378 | $87,059 | $341,300 |
04859 | Spruce Head , ME | Standard | 753 | $75,341 | — |
04860 | Tenants Harbor , ME | Standard | 1,543 | $86,833 | $271,400 |
04861 | Thomaston , ME | Standard | 2,769 | $56,435 | $271,700 |
04862 | Union , ME | Standard | 4,023 | $73,536 | $252,300 |
04863 | Vinalhaven , ME | Standard | 1,216 | $72,963 | $428,400 |
04864 | Warren , ME | Standard | 4,932 | $74,616 | $232,700 |
04865 | West Rockport , ME | No street area | — | — | — |
Cite this page
zipcodes.pro. “Knox County ZIP codes.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/state/me/county/knox
Underlying data is public domain or openly licensed — sources, vintages and licences.