47,946 people (2024 Census estimate, +1.7% since 2020)
4,802 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.
45 active community water systems list Campbell County in the area they serve, reporting 48,536 people served in all (a system that crosses county lines counts its whole population).
| GILLETTE, CITY OF groundwater · local government · WY5600019 | 32,222 served |
| WRIGHT WATER & SEWER DISTRICT groundwater · local government · WY5600136 | 3,207 served |
| SLEEPY HOLLOW SUBDIVISION groundwater · private · WY5600764 | 2,400 served |
| ANTELOPE VALLEY I&S DISTRICT (AVISD) groundwater · private · WY5600251 | 1,280 served |
| FOX PARK SUBDIVISION groundwater · local government · WY5600745 | 843 served |
| HERITAGE VILLAGE SUBDIVISION groundwater · private · WY5600249 | 750 served |
| FOOTHILLS MOBILE HOME PARK buys groundwater · private · WY5601239 | 735 served |
| EASTVIEW MANUFACTURED HOME COMMUNITY buys groundwater · private · WY5601353 | 688 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 196 people were held in Campbell County's jail, in Vera's latest figure (2018), or 629 per 100,000 residents ages 15–64. In 2013 it was about 137.
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.
1 school district has its office in Campbell County. School taxes are usually the largest part of a property tax bill.
Spent $165.2 million — $152.1 million to run schools, about $17,610 per student, plus $10.7 million on buildings and equipment. Money in: $110.8 million local (mostly property tax), $31 million state, $23.8 million 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: Relatively Low compared with other U.S. counties. FEMA estimates natural hazards cost Campbell County about $25 million a year on average in buildings, crops and lives. Ability to bounce back (community resilience): Very Low; social vulnerability: Very Low.
Source: FEMA National Risk Index (December 2025), expected annual loss. Ratings compare counties nationwide; they're estimates, not predictions.
152 bridges in Campbell County: 34 in good condition, 114 fair, and 4 poor (2.6%). “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.
| I-90 EBL and WBL over BNSF / US 14/16 · built 1972 | 4,856 vehicles a day |
| I-90 WBL over Machinery Pass · built 1976 | 3,932 vehicles a day |
| WYO 59 over Dry Fork Creek · built 1960 | 1,336 vehicles a day |
| Cl Cnty Rd 20 over Lil N Fk Dead Horse Crk · built 1965 | 243 vehicles a day |
Source: Federal Highway Administration, National Bridge Inventory (2025 submission). Includes state, county and city bridges.
Federal grants paid for $8.5 million of work in Campbell County in fiscal 2025, about $180 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 Wyoming 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 Campbell 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 Campbell County built: brayden.ozark@gmail.com.
More of Wyoming: the state government and every county in Wyoming.
Nearby counties: Weston County (53 mi) · Johnson County (54 mi) · Crook County (54 mi) · Sheridan County (79 mi) · Converse County (83 mi) · Powder River County, MT (84 mi).