32,978 people (2024 Census estimate, +6.4% since 2020)
2,523 square miles of land · 13 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.
6 active community water systems list Sheridan County in the area they serve, reporting 26,272 people served in all (a system that crosses county lines counts its whole population).
| SHERIDAN, CITY OF surface water · local government · WY5600052 | 22,700 served |
| RANCHESTER, TOWN OF surface water · local government · WY5600044 | 1,297 served |
| DAYTON, TOWN OF surface water · local government · WY5600202 | 957 served |
| VETERANS ADMINISTRATION MEDICAL CENTER surface water · federal · WY5680001 | 802 served |
| DOWNER NEIGHBORHOOD I&S DISTRICT buys surface water · private · WY5601537 | 400 served |
| CLEARMONT, TOWN OF groundwater · local government · WY5600013 | 116 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 66 people were held in Sheridan County's jail, in Vera's latest figure (2019), or 351 per 100,000 residents ages 15–64. In 2014 it was about 76.
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.
3 school districts have their office in Sheridan County. School taxes are usually the largest part of a property tax bill.
Spent $60.7 million — $55.4 million to run schools, about $15,381 per student, plus $4.6 million on buildings and equipment. Money in: $19.8 million local (mostly property tax), $31.7 million state, $8.4 million federal.
Spent $23.7 million — $21.1 million to run schools, about $18,112 per student, plus $2.1 million on buildings and equipment. Money in: $6.8 million local (mostly property tax), $13.7 million state, $1.4 million federal.
Spent $3.8 million — $3.6 million to run schools, about $43,829 per student, plus $164,000 on buildings and equipment. Money in: $830,000 local (mostly property tax), $2.8 million state, $413,000 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 Sheridan County about $25.8 million a year on average in buildings, crops and lives. Ability to bounce back (community resilience): Relatively Moderate; social vulnerability: Relatively Low.
Source: FEMA National Risk Index (December 2025), expected annual loss. Ratings compare counties nationwide; they're estimates, not predictions.
170 bridges in Sheridan County: 37 in good condition, 124 fair, and 9 poor (5.3%). “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.
| 5th Street over Big Goose Creek · built 1968 | 9,363 vehicles a day |
| I-90 EBL over WYO 342 · built 1968 | 3,624 vehicles a day |
| N Brooks Street over Little Goose Creek · built 1970 | 3,068 vehicles a day |
| I-90 WBL over Machinery Pass · built 1983 | 2,158 vehicles a day |
| W 11th Street over Big Goose Creek · built 1981 | 1,757 vehicles a day |
| E Heald Street over Little Goose Creek · built 1970 | 1,708 vehicles a day |
Source: Federal Highway Administration, National Bridge Inventory (2025 submission). Includes state, county and city bridges.
Federal grants paid for $47.7 million of work in Sheridan County in fiscal 2025, about $1,544 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 Sheridan 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 Sheridan County built: brayden.ozark@gmail.com.
More of Wyoming: the state government and every county in Wyoming.
Nearby counties: Johnson County (53 mi) · Big Horn County, MT (53 mi) · Big Horn County (57 mi) · Washakie County (73 mi) · Powder River County, MT (78 mi) · Campbell County (78 mi).