66,776 people (2024 Census estimate, −0.4% since 2020)
6,671 square miles of land · 10 people per square mile
“Highest” and “lowest” are just order, not grades: a high rank for poverty or hazard losses means more of it. Each figure's source is in its section below.
39 active community water systems list Aroostook County in the area they serve, reporting 30,302 people served in all (a system that crosses county lines counts its whole population).
| PRESQUE ISLE UTILITIES DISTRICT groundwater (surface-influenced) · local government · ME0091310 | 6,128 served |
| HOULTON WATER COMPANY groundwater · local government · ME0090700 | 4,735 served |
| CARIBOU UTILITIES DISTRICT groundwater · local government · ME0090320 | 3,943 served |
| MADAWASKA WATER DISTRICT groundwater · local government · ME0090920 | 2,738 served |
| VAN BUREN WATER DISTRICT groundwater · local government · ME0091540 | 2,190 served |
| FORT FAIRFIELD UTILITIES DISTRICT surface water · local government · ME0090550 | 2,025 served |
| FORT KENT W & W DEPARTMENT groundwater · local government · ME0090560 | 1,578 served |
| MARS HILL AND BLAINE WATER COMPANY groundwater · local government · ME0090940 | 1,500 served |
Source: U.S. EPA Safe Drinking Water Information System (SDWIS), active community systems, . Look up any system's violations and test results with EPA's search using its ID.
About 115 people were held in Aroostook County's jail, in Vera's latest figure (2023), or 291 per 100,000 residents ages 15–64. In 2018 it was about 110.
Source: Vera Institute of Justice, Incarceration Trends (built from federal Bureau of Justice Statistics jail surveys). Counties without their own jail, or that share one, may show no figure.
17 school districts have their office in Aroostook County. School taxes are usually the largest part of a property tax bill.
Spent $30.6 million — $29.4 million to run schools, about $17,150 per student, plus $12,000 on buildings and equipment. Money in: $9.7 million local (mostly property tax), $17.3 million state, $3.5 million federal.
Spent $20.2 million — $19.5 million to run schools, about $15,327 per student, plus $276,000 on buildings and equipment. Money in: $2.8 million local (mostly property tax), $10 million state, $1.5 million federal. Long-term debt: $560,000.
Spent $23.3 million — $21 million to run schools, about $17,225 per student, plus $749,000 on buildings and equipment. Money in: $6.5 million local (mostly property tax), $15.6 million state, $2.8 million federal. Long-term debt: $24 million.
Spent $15.3 million — $14 million to run schools, about $17,172 per student, plus $592,000 on buildings and equipment. Money in: $6.2 million local (mostly property tax), $7 million state, $1 million federal. Long-term debt: $2.4 million.
Spent $8.5 million — $8.3 million to run schools, about $16,700 per student, plus $78,000 on buildings and equipment. Money in: $3.4 million local (mostly property tax), $4.1 million state, $1.2 million federal. Long-term debt: $1.3 million.
Spent $8.7 million — $8.4 million to run schools, about $17,378 per student, plus $144,000 on buildings and equipment. Money in: $2.4 million local (mostly property tax), $5.1 million state, $1.5 million federal. Long-term debt: $2.1 million.
Spent $9.4 million — $8.9 million to run schools, about $22,194 per student, plus $364,000 on buildings and equipment. Money in: $4.5 million local (mostly property tax), $3.6 million state, $488,000 federal. Long-term debt: $171,000.
Spent $6.8 million — $6.6 million to run schools, about $19,080 per student, plus $64,000 on buildings and equipment. Money in: $3 million local (mostly property tax), $2.7 million state, $1.2 million federal. Long-term debt: $3.2 million.
And 9 more.
Source: U.S. Census Bureau, 2023 Annual Survey of School System Finances. Districts are listed by the county of their main office; some serve neighboring counties too.
Source: County Health Rankings & Roadmaps 2025 (University of Wisconsin Population Health Institute), which gathers federal data (CDC, Census, and others); measures cover different recent years. Blank lines aren't reported for small counties.
Overall risk: Relatively Low compared with other U.S. counties. FEMA estimates natural hazards cost Aroostook County about $34.8 million a year on average in buildings, crops and lives. Ability to bounce back (community resilience): Relatively Moderate; social vulnerability: Relatively High.
Source: FEMA National Risk Index (December 2025), expected annual loss. Ratings compare counties nationwide; they're estimates, not predictions.
231 bridges in Aroostook County: 42 in good condition, 162 fair, and 27 poor (11.7%). “Poor” means a main part — the deck, the beams, or the supports — is rated 4 or lower on the federal 0–9 scale. It doesn't mean unsafe to drive; unsafe bridges are closed.
| NORTH ST over MEDUXNEKEAG RIVER · built 1944 | 13,721 vehicles a day |
| LIMESTONE RD over AROOSTOOK RIV ABANDD RR · built 1956 | 3,620 vehicles a day |
| MAIN ST over N BR PRESQUE ISLE STREAM · built 1922 | 2,830 vehicles a day |
| FORT ST over RIVER RR & STREET · built 1952 | 2,790 vehicles a day |
| MAIN ST over PATTIE BROOK · built 1930 | 2,210 vehicles a day |
| VAN BUREN RD over HALFWAY BROOK · built 1933 | 1,758 vehicles a day |
Source: Federal Highway Administration, National Bridge Inventory (2025 submission). Includes state, county and city bridges.
Federal grants paid for $126.7 million of work in Aroostook County in fiscal 2025, about $1,888 per resident — to the county, cities, schools, hospitals, nonprofits and others.
Source: USAspending.gov, grants by place of performance, fiscal 2025 (Oct. 2024 to Sept. 2025). Search it by county to see each award.
From Grants.gov: posted grants listing county governments as eligible, soonest deadline first; research-only and overseas programs left out; list updated 2026-10-13, refreshed weekly. 62 are open in all. Cities, towns, school districts and nonprofits have their own lists there.
Registration deadlines, early voting and polling places for Maine are on the federal site vote.gov, which links to the state's official election office.
The budget, property tax rates, audits, local officials and offices for Aroostook County come from the county's own records, which we haven't gathered — not gathered, never hidden. See what a full county site looks like, or ask to have Aroostook County built: brayden.ozark@gmail.com.
More of Maine: the state government and every county in Maine.
Nearby counties: Piscataquis County (59 mi) · Penobscot County (90 mi) · Somerset County (105 mi) · Washington County (129 mi) · Franklin County (147 mi) · Hancock County (148 mi).