Aroostook County, Maine

Aroostook County, Maine, has 66,609 residents (July 2025 estimate). Its county seat is Houlton. It uses Eastern Time and covers 6,671 sq mi (17,278 km²) of land.

Aroostook County in Maine

Aroostook County and its neighbors (simplified outlines). Open in OpenStreetMap ↗

Resident population, July 2025: 66,609
Land area: 6,671 sq mi (17,278 km²)
County seat or government: Houlton
Time zone: Eastern TimeUTC-05:00 in January; UTC-04:00 in July
Median household income: $56,700 ± $1,809
Median home value: $149,700 ± $6,059
Median rent, with utilities: $784 ± $37
Homes lived in by their owners: 74.5% ± 1.3 points
County type: County
Metro or micro area: Outside any metro or micro areaNext to: Bangor, ME metro area
Water area: 156 sq mi (405 km²)
State: Maine
County code (FIPS): 23003
Coordinates (central point): 46.709193, -68.612409

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These coordinates mark a central point for the area, not a street address. Income, home value, rent and homes lived in by their owners: U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates, ± margin at 90% confidence; checked on October 13, 2026.

Time zones in Aroostook County

Time zone	Local time and UTC offset	Next clock change
Eastern TimeAmerica/New_York	UTC-05:00 in January; UTC-04:00 in July. Enable JavaScript for the live clock.	Enable JavaScript for upcoming changes.

Near a time-zone line, check where you are with the time-zone finder. Your phone’s setting can differ.

ZIP Code areas, largest first

0473010,106 people
047369,025 people
047698,736 people
047434,770 people
047563,341 people
047423,309 people
047572,627 people
047852,073 people
047501,815 people
047861,599 people
047401,433 people
047321,427 people

All 42

047581,405 people
047471,316 people
04776999 people
04424983 people
04745971 people
04772842 people
04739825 people
04734804 people
04780783 people
04459750 people
04471730 people
04760674 people
04763629 people
04774624 people
04773550 people
04783545 people
04781528 people
04762494 people
04735492 people
04733465 people
04779446 people
04746407 people
04787382 people
04768374 people
04761372 people
04766326 people
04497311 people
04451217 people
0476488 people
047370 people

42 ZIP Code areas overlap Aroostook County. People counts are 2020–2024 estimates for each whole ZIP area. Mailing ZIPs can differ; check an address with USPS ZIP Code Lookup.

Official county information

We don’t have a website for this county yet. The US government’s local-office directory ↗ lists its offices. A geographic lookup cannot determine eligibility, tax liability or a court obligation.

Towns and plantations in Aroostook County, largest first

Town of Houlton6,056 people
Town of Fort Kent4,150 people
Town of Madawaska3,853 people
Town of Fort Fairfield3,309 people
Town of Mapleton1,884 people
Town of Van Buren1,858 people
Town of Limestone1,579 people
Town of Easton1,433 people
Town of Hodgdon1,428 people
Town of Mars Hill1,398 people
Town of Washburn1,355 people
Town of Linneus1,226 people

All 62

People counts are American Community Survey 2020–2024 5-year estimates. All towns and plantations in Maine, by county

School districts in Aroostook County, largest first

School Administrative District 0111,678 people
School Administrative District 297,682 people
Regional School Unit 397,604 people
School Administrative District 275,693 people
School Administrative District 703,996 people
Madawaska3,853 people
School Administrative District 203,309 people
Regional School Unit 892,846 people
Regional School Unit 502,718 people
Aroostook Unorganized Territory2,309 people
School Administrative District 422,104 people
School Administrative District 242,028 people

All 33

School Administrative District 451,925 people
School Administrative District 331,813 people
School Administrative District 321,789 people
Limestone Public Schools1,579 people
Easton1,433 people
Woodland1,196 people
School Administrative District 14941 people
Eagle Lake Public Schools570 people
New Sweden494 people
Bridgewater484 people
Grand Isle407 people
Winterville Plantation Public Schools248 people
Caswell243 people
School Administration District 10224 people
Orient137 people
Westmanland108 people
Reed Plantation105 people
Macwahoc Plantation79 people
Nashville Plantation12 people
Moro Plantation Public Schools10 people
Glenwood Plantation6 people

Districts with land in the county; a district can cross county lines. People counts are American Community Survey 2020–2024 5-year estimates. A district boundary doesn’t decide which school a student attends.

Tribal areas in Aroostook County, largest first

Houlton Maliseet Reservation and Off-Reservation Trust Land269 people
Aroostook Band of Micmac Trust Land207 people

American Indian, Alaska Native and Native Hawaiian areas as the Census Bureau maps them, with at least 2% of their area here, water included. These lines don’t decide membership, jurisdiction or land status.

Cities, towns and communities, largest first

These areas overlap the mapped boundary; an overlap does not mean that every address belongs to both.

All 17

Bordering areas, nearest first

Distances are straight lines between map points.

Piscataquis County, Maine60 mi southwest
Penobscot County, Maine90 mi south
Somerset County, Maine105 mi southwest
Washington County, Maine130 mi south

Before using this answer on a form

Use a precise point for address-level questions. A device accuracy circle can cross a boundary; confirm tax, voting or jury details with the responsible office.

Find the county where you are now, check its ZIP area, or check the time zone where you are.

See this county on Census.gov ↗

Areas that only touch the edge

These areas meet the boundary only along a sliver. Most addresses here are not in them; for an address near the line, check with the county.