794 people (2024 Census estimate, +0.1% since 2020)
1,763 square miles of land · 0 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.
1 active community water system list Clark County in the area they serve, reporting 511 people served in all (a system that crosses county lines counts its whole population).
| DUBOIS CITY OF groundwater · local government · ID7170003 | 511 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 2 people were held in Clark County's jail, in Vera's latest figure (2019), or 406 per 100,000 residents ages 15–64. In 2014 it was about 2.
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 Clark County. School taxes are usually the largest part of a property tax bill.
Spent $2.4 million — $2.4 million to run schools, about $20,359 per student, plus $26,000 on buildings and equipment. Money in: $436,000 local (mostly property tax), $1.8 million state, $430,000 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 Clark County about $1.4 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.
39 bridges in Clark County: 9 in good condition, 25 fair, and 5 poor (12.8%). “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 15 SBL over CO.RD.;STODDARD CREEK IC · built 1969 | 1,750 vehicles a day |
| STC 6760;RED ROAD over CAMAS CREEK · built 1953 | 200 vehicles a day |
| OLD HWY 91 over UPRR;N.SPENCER RR OP · built 1936 | 50 vehicles a day |
| DIVERSION ROAD over CAMAS CREEK · built 1953 | 50 vehicles a day |
| VADNAIS LANE over CAMAS CREEK · built 1981 | 50 vehicles a day |
Source: Federal Highway Administration, National Bridge Inventory (2025 submission). Includes state, county and city bridges.
Federal grants paid for $546,371 of work in Clark County in fiscal 2025, about $692 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 Clark 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 Clark County built: brayden.ozark@gmail.com.
More of Idaho: the state government and every county in Idaho.
Nearby counties: Jefferson County (34 mi) · Fremont County (43 mi) · Madison County (49 mi) · Butte County (58 mi) · Beaverhead County, MT (64 mi) · Teton County (67 mi).