4,998 people (2024 Census estimate, +12.9% since 2020)
1,363 square miles of land · 4 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.
5 active community water systems list Adams County in the area they serve, reporting 2,404 people served in all (a system that crosses county lines counts its whole population).
| COUNCIL CITY OF groundwater · local government · ID3020002 | 900 served |
| MEADOW CREEK PROPERTY OWNERS ASSN INC groundwater · private · ID3020009 | 800 served |
| NEW MEADOWS CITY OF groundwater · local government · ID3020012 | 582 served |
| KINGS PINES ESTATES WATER SYSTEM groundwater · private · ID3020038 | 96 served |
| GOOSE CREEK RENTALS groundwater · private · ID3020007 | 26 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 29 people were held in Adams County's jail, in Vera's latest figure (2019), or 1,202 per 100,000 residents ages 15–64. In 2014 it was about 29.
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.
2 school districts have their office in Adams County. School taxes are usually the largest part of a property tax bill.
Spent $4 million — $4 million to run schools, about $10,643 per student, plus $55,000 on buildings and equipment. Money in: $530,000 local (mostly property tax), $3 million state, $849,000 federal. Long-term debt: $2.1 million.
Spent $2.8 million — $2.7 million to run schools, about $18,817 per student, plus $149,000 on buildings and equipment. Money in: $529,000 local (mostly property tax), $1.9 million state, $416,000 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: Very Low compared with other U.S. counties. FEMA estimates natural hazards cost Adams County about $10.1 million a year on average in buildings, crops and lives. Ability to bounce back (community resilience): Very Low; social vulnerability: Relatively High.
Source: FEMA National Risk Index (December 2025), expected annual loss. Ratings compare counties nationwide; they're estimates, not predictions.
87 bridges in Adams County: 27 in good condition, 52 fair, and 8 poor (9.2%). “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.
| OLD HORNET ROAD over HORNET CREEK · built 1949 | 100 vehicles a day |
| MIDDLE FORK ROAD over M.FK.WEISER RIVER · built 1957 | 70 vehicles a day |
| JACKSON CREEK RD over WEISER RIVER · built 1988 | 50 vehicles a day |
| NO DATA ENTERED over BOULDER CREEK · built 1957 | 50 vehicles a day |
| WILDHORSE ROAD over WILDHORSE RIVER · built 1908 | 30 vehicles a day |
| OLD HWY 95 over LITTLE SALMON RIVER · built 1923 | 20 vehicles a day |
Source: Federal Highway Administration, National Bridge Inventory (2025 submission). Includes state, county and city bridges.
Federal grants paid for $4.8 million of work in Adams County in fiscal 2025, about $1,092 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 Idaho 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 Adams 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 Adams County built: brayden.ozark@gmail.com.
More of Idaho: the state government and every county in Idaho.
Nearby counties: Washington County (34 mi) · Valley County (41 mi) · Gem County (56 mi) · Wallowa County, OR (61 mi) · Baker County, OR (61 mi) · Payette County (62 mi).