5,452 people (2024 Census estimate, +14.8% since 2020)
1,869 square miles of land · 3 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.
4 active community water systems list Musselshell County in the area they serve, reporting 2,220 people served in all (a system that crosses county lines counts its whole population).
| ROUNDUP WATER DEPARTMENT buys groundwater · local government · MT0000321 | 1,900 served |
| MELSTONE TOWN OF buys groundwater · local government · MT0000290 | 170 served |
| MUSSELSHELL COMMUNITY COUNTY WSD groundwater · local government · MT0000296 | 75 served |
| SUNSET COLONY UNAPPROVED buys groundwater · private · MT0005111 | 75 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 6 people were held in Musselshell County's jail, in Vera's latest figure (2018), or 216 per 100,000 residents ages 15–64. In 2013 it was about 6.
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.
4 school districts have their office in Musselshell County. School taxes are usually the largest part of a property tax bill.
Spent $5.1 million — $4.7 million to run schools, about $11,486 per student, plus $106,000 on buildings and equipment. Money in: $2.7 million local (mostly property tax), $2.1 million state, $1.1 million federal. Long-term debt: $6 million.
Spent $2.7 million — $2.5 million to run schools, about $14,826 per student, plus $10,000 on buildings and equipment. Money in: $2 million local (mostly property tax), $1.3 million state, $18,000 federal. Long-term debt: $2.1 million.
Spent $960,000 — $948,000 to run schools, about $20,170 per student. Money in: $297,000 local (mostly property tax), $499,000 state, $185,000 federal.
Spent $902,000 — $888,000 to run schools, about $26,909 per student. Money in: $368,000 local (mostly property tax), $580,000 state, $0 federal.
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: Very Low compared with other U.S. counties. FEMA estimates natural hazards cost Musselshell County about $4.9 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.
28 bridges in Musselshell County: 16 in good condition, 11 fair, and 1 poor (3.6%). “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.
| HARVEY RD over MUSSELSHELL RIVER 018 · built 1916 | 100 vehicles a day |
Source: Federal Highway Administration, National Bridge Inventory (2025 submission). Includes state, county and city bridges.
Federal grants paid for $605,041 of work in Musselshell County in fiscal 2025, about $128 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 Musselshell 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 Musselshell County built: brayden.ozark@gmail.com.
More of Montana: the state government and every county in Montana.
Nearby counties: Golden Valley County (36 mi) · Yellowstone County (40 mi) · Petroleum County (45 mi) · Treasure County (59 mi) · Fergus County (62 mi) · Wheatland County (67 mi).