10,006 people (2024 Census estimate, +6.7% since 2020)
5,543 square miles of land · 2 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.
9 active community water systems list Beaverhead County in the area they serve, reporting 5,577 people served in all (a system that crosses county lines counts its whole population).
| DILLON CITY OF groundwater · local government · MT0000201 | 4,300 served |
| KELLER SUBDIVISION NO 2 HOA groundwater · private · MT0002485 | 300 served |
| HILDRETH SUBDIVISION NO 2 groundwater · private · MT0002486 | 300 served |
| LIMA TOWN OF groundwater · local government · MT0000276 | 279 served |
| HILDRETH SUBDIVISION NO 3 groundwater · private · MT0003968 | 128 served |
| WESTERN MOBILE VILLAGE DILLON groundwater · private · MT0002171 | 75 served |
| SKYLINE TR CT AND RV PARK groundwater · private · MT0002515 | 75 served |
| CLARKS LOOKOUT groundwater · private · MT0004249 | 62 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 10 people were held in Beaverhead County's jail, in Vera's latest figure (2021), or 168 per 100,000 residents ages 15–64. In 2016 it was about 14.
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.
9 school districts have their office in Beaverhead County. School taxes are usually the largest part of a property tax bill.
Spent $9.1 million — $8.7 million to run schools, about $11,122 per student, plus $289,000 on buildings and equipment. Money in: $3.6 million local (mostly property tax), $4.2 million state, $2 million federal. Long-term debt: $8.3 million.
Spent $6.9 million — $5.7 million to run schools, about $16,794 per student, plus $497,000 on buildings and equipment. Money in: $3.8 million local (mostly property tax), $2.5 million state, $315,000 federal. Long-term debt: $10.5 million.
Spent $1.6 million — $1.5 million to run schools, about $25,467 per student, plus $52,000 on buildings and equipment. Money in: $797,000 local (mostly property tax), $720,000 state, $178,000 federal.
Spent $266,000 — $259,000 to run schools, about $15,235 per student. Money in: $90,000 local (mostly property tax), $149,000 state, $56,000 federal.
Spent $197,000 — $188,000 to run schools, about $20,889 per student. Money in: $79,000 local (mostly property tax), $72,000 state, $63,000 federal.
Spent $139,000 — $129,000 to run schools, about $18,429 per student. Money in: $62,000 local (mostly property tax), $60,000 state, $24,000 federal.
Spent $128,000 — $118,000 to run schools, about $23,600 per student, plus $3,000 on buildings and equipment. Money in: $45,000 local (mostly property tax), $75,000 state, $15,000 federal.
Spent $140,000 — $140,000 to run schools, about $46,667 per student. Money in: $62,000 local (mostly property tax), $44,000 state, $38,000 federal.
And 1 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 Beaverhead County about $9.9 million a year on average in buildings, crops and lives. Ability to bounce back (community resilience): Relatively Low; social vulnerability: Relatively High.
Source: FEMA National Risk Index (December 2025), expected annual loss. Ratings compare counties nationwide; they're estimates, not predictions.
227 bridges in Beaverhead County: 53 in good condition, 150 fair, and 24 poor (10.6%). “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.
| HWY 91 N over BEAVERHEAD RIVER 033 · built 1946 | 2,676 vehicles a day |
| I 15 over INT LIMA-BAILEY ST · built 1959 | 1,863 vehicles a day |
| I 15 over INT MONIDA S 509 · built 1959 | 1,771 vehicles a day |
| MT HWY 91 over RR · built 1936 | 612 vehicles a day |
| HWY 91 N over BIG HOLE RIVER 041 · built 1940 | 158 vehicles a day |
| CORINNE TRAIL over HORSE PRAIRIE CREEK 043 · built 2022 | 100 vehicles a day |
Source: Federal Highway Administration, National Bridge Inventory (2025 submission). Includes state, county and city bridges.
Federal grants paid for $9.4 million of work in Beaverhead County in fiscal 2025, about $1,007 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 Montana 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 Beaverhead 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 Beaverhead County built: brayden.ozark@gmail.com.
More of Montana: the state government and every county in Montana.
Nearby counties: Madison County (49 mi) · Lemhi County, ID (50 mi) · Silver Bow County (54 mi) · Clark County, ID (64 mi) · Deer Lodge County (67 mi) · Jefferson County (79 mi).