The County in numbers
| Population | 65,169 (2020 U.S. Census) |
|---|---|
| Land area | 2,609 sq mi |
| Municipalities | 64 with local government: 2 cities, 53 towns and 9 organized plantations |
| County seat | Houlton |
| Largest community | Presque Isle (8,797 people, 2020 Census) |
| Northern border | Canada — New Brunswick and Quebec |
Population is the sum of the 2020 Census counts for the 64 municipalities listed below. The U.S. Census Bureau also reports the County's unorganized territories as separate county subdivisions; two of them, Bancroft and Sinclair, have their own pages here.
How the County is organised
Maine gives communities two levels of local government, and Aroostook County uses both. Sixty-four of the communities here are municipalities with their own elected government. Nine areas inside the County are unorganized territories, which means they have no town government — the State of Maine and the county run local services there.
Plantations are a Maine-specific form of local government that sits between a town and an unorganized territory. Aroostook County has 9 of them, including Glenwood, which is the smallest municipality in the County.
The four regions
The County is usually described in four broad regions. Each has its own character, and each has its own town list in the town finder.
| Region | Towns | 2020 population | Communities |
|---|---|---|---|
| St. John Valley | 13 | 14,131 | Allagash, Cyr, Fort Kent, Frenchville, Grand Isle, Hamlin, Madawaska, New Canada, St. Agatha, St. Francis, St. John, Van Buren, Wallagrass |
| North & Lakes | 9 | 2,971 | Ashland, Eagle Lake, Garfield, Glenwood, Masardis, Nashville, Portage Lake, Reed, Winterville |
| Central Aroostook | 25 | 36,357 | Blaine, Bridgewater, Caribou, Castle Hill, Caswell, Chapman, Easton, Fort Fairfield, Limestone, Linneus, Littleton, Ludlow, Mapleton, Mars Hill, Monticello, New Limerick, New Sweden, Perham, Presque Isle, Stockholm, Wade, Washburn, Westfield, Westmanland, Woodland |
| Southern Aroostook | 17 | 11,710 | Amity, Crystal, Dyer Brook, Hammond, Haynesville, Hersey, Hodgdon, Houlton, Island Falls, Macwahoc, Merrill, Moro, Oakfield, Orient, Sherman, Smyrna, Weston |
Unorganized territories
These areas are inside the Aroostook County line but have no town government of their own.
County government
Aroostook County is governed by a board of county commissioners and run by an elected county manager. The county handles what counties do in Maine: county roads, the sheriff's office, the registry of deeds, the probate court, the tax collector, the emergency management agency and the unorganized territory services department — which is exactly the department that looks after places like Bancroft and Sinclair.
The Aroostook County government keeps its own directory of County municipalities, and the State of Maine publishes a full list of municipal clerks. Both are useful starting points when you need official information.
Sources
- Population, area and coordinates: U.S. Census Bureau, 2020 Census Redistricting Data (P.L. 94-171).
- Municipal clerk details: Maine Secretary of State, list last updated 10/02/2026.
- Official town websites: linked from each town page, checked 2026-10-21.