3,728 people (2024 Census estimate, +5.8% since 2020)
479 square miles of land · 8 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 Lewis County in the area they serve, reporting 2,976 people served in all (a system that crosses county lines counts its whole population).
| KAMIAH CITY OF surface water · local government · ID2310003 | 1,495 served |
| CRAIGMONT CITY OF groundwater · local government · ID2310001 | 501 served |
| NEZPERCE WATER DEPT groundwater · local government · ID2310005 | 460 served |
| WINCHESTER WATER DEPT groundwater · local government · ID2310007 | 400 served |
| REUBENS CITY OF groundwater · local government · ID2310006 | 70 served |
| LAWYERS CREEK WATER DIST groundwater · private · ID2310004 | 50 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 10 people were held in Lewis County's jail, in Vera's latest figure (2019), or 504 per 100,000 residents ages 15–64. In 2014 it was about 11.
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 Lewis County. School taxes are usually the largest part of a property tax bill.
Spent $6 million — $6 million to run schools, about $15,226 per student, plus $32,000 on buildings and equipment. Money in: $479,000 local (mostly property tax), $3.6 million state, $2.2 million federal.
Spent $3.3 million — $3 million to run schools, about $16,939 per student, plus $217,000 on buildings and equipment. Money in: $848,000 local (mostly property tax), $2.3 million state, $455,000 federal. Long-term debt: $112,000.
Spent $3.4 million — $3.4 million to run schools, about $20,172 per student. Money in: $833,000 local (mostly property tax), $2.2 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 Lewis County about $2 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.
21 bridges in Lewis County: 12 in good condition, 8 fair, and 1 poor (4.8%). “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.
| ACCESS RD; PARK RD over LAWYERS CREEK;PARK BR · built 1917 | 50 vehicles a day |
Source: Federal Highway Administration, National Bridge Inventory (2025 submission). Includes state, county and city bridges.
Federal grants paid for $20.7 million of work in Lewis County in fiscal 2025, about $5,850 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 Lewis 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 Lewis County built: brayden.ozark@gmail.com.
More of Idaho: the state government and every county in Idaho.
Nearby counties: Nez Perce County (17 mi) · Asotin County, WA (39 mi) · Latah County (43 mi) · Clearwater County (48 mi) · Idaho County (53 mi) · Garfield County, WA (55 mi).