Maine County Map
Labeled county boundary map and complete directory of all 16 counties in Maine (ME, State FIPS 23). View 5-digit FIPS codes, county seats, land area in square miles, and official county government websites below.
Showing all 16 counties in Maine. Use the search box below to filter by county name, 5-digit FIPS code, or county seat.
Maine County Statistics & Summary
Total Counties
16
Largest by Land Area
Aroostook County
Smallest by Land Area
Sagadahoc County
All 16 Counties in Maine (FIPS, County Seat & Official Website)
| County Name | 5-Digit FIPS | Seat / Administrative Center | Land Area (sq mi) | Coordinates | Official Website |
|---|---|---|---|---|---|
| Androscoggin County | 23001 | Auburn | 468 | 44.168°, -70.207° | Official Site |
| Aroostook County | 23003 | Houlton | 6,671.2 | 46.709°, -68.612° | Official Site |
| Cumberland County | 23005 | Portland | 836.2 | 43.808°, -70.330° | Official Site |
| Franklin County | 23007 | Farmington | 1,697 | 44.977°, -70.415° | Official Site |
| Hancock County | 23009 | Ellsworth | 1,587.2 | 44.563°, -68.377° | Official Site |
| Kennebec County | 23011 | Augusta | 867.5 | 44.417°, -69.766° | Official Site |
| Knox County | 23013 | Rockland | 364.9 | 44.042°, -69.038° | Official Site |
| Lincoln County | 23015 | Wiscasset | 455.9 | 43.995°, -69.514° | Official Site |
| Oxford County | 23017 | Paris | 2,077 | 44.495°, -70.734° | Official Site |
| Penobscot County | 23019 | Bangor | 3,397 | 45.411°, -68.668° | Official Site |
| Piscataquis County | 23021 | Dover-Foxcroft | 3,960.8 | 45.916°, -69.102° | Official Site |
| Sagadahoc County | 23023 | Bath | 254 | 43.917°, -69.844° | Official Site |
| Somerset County | 23025 | Skowhegan | 3,924.3 | 45.504°, -69.956° | Official Site |
| Waldo County | 23027 | Belfast | 730.2 | 44.475°, -69.117° | Official Site |
| Washington County | 23029 | Machias | 2,562.7 | 44.967°, -67.609° | Official Site |
| York County | 23031 | Alfred | 991.2 | 43.429°, -70.674° | Official Site |
How Maine Counties and 5-Digit FIPS Codes Work
In U.S. Census Bureau TIGER/Line geography, Maine (ME) is assigned the 2-digit state Federal Information Processing Series (FIPS) code 23 and covers 30,845 square miles of land area across 16 counties in the Eastern Time (ET) zone (with Augusta as the state capital). Every county in the directory above carries a unique 5-digit GEOID formed by combining state prefix 23 with a 3-digit county code (ranging alphabetically from Androscoggin County at 23001 to York County at 23031).
Because U.S. Postal Service 5-digit ZIP Codes follow mail carrier delivery routes rather than local government borders, many postal addresses in Maine carry a neighboring city’s mailing name or sit inside a multi-county ZIP Code Tabulation Area (ZCTA). Property tax assessments, deed recording, circuit and county court venue, voter registration precincts, sheriff jurisdiction, and county sales tax rates in Maine are determined by the legal county boundary shown on the map above rather than the postal city name on an envelope.
Land area figures in square miles and internal centroid coordinates (INTPTLAT, INTPTLON) come directly from the U.S. Census Bureau’s current TIGERweb State_County benchmark, while 16 administrative seats and 16 verified official government websites are cross-referenced from Wikidata (CC0). Need a clean outline worksheet without county labels, or want to verify which Maine county a specific home or business address sits in? Open the Blank Map of Maine, run a street-segment check on Address to County Lookup, check multi-county postal overlap on ZIP Code to County Lookup, or browse all 50 states on the National U.S. County Map.
Adjacent State County Maps
Explore county maps and FIPS directories for states bordering Maine: