10,062 people (2024 Census estimate, −2.0% since 2020)
717 square miles of land · 14 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.
11 active community water systems list Nemaha County in the area they serve, reporting 9,623 people served in all (a system that crosses county lines counts its whole population).
| NEMAHA CO RWD 3 groundwater · local government · KS2013110 | 2,800 served |
| SABETHA, CITY OF surface water · local government · KS2013101 | 2,519 served |
| SENECA, CITY OF surface water · local government · KS2013102 | 2,130 served |
| CENTRALIA, CITY OF buys groundwater · local government · KS2013106 | 486 served |
| NEMAHA CO RWD 4 groundwater · local government · KS2013112 | 448 served |
| NEMAHA CO RWD 1 groundwater · local government · KS2013105 | 350 served |
| WETMORE, CITY OF groundwater · local government · KS2013111 | 348 served |
| CORNING, CITY OF buys groundwater · local government · KS2013107 | 213 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 8 people were held in Nemaha County's jail, in Vera's latest figure (2023), or 138 per 100,000 residents ages 15–64. In 2018 it was about 13.
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 Nemaha County. School taxes are usually the largest part of a property tax bill.
Spent $18.1 million — $14.7 million to run schools, about $13,728 per student, plus $3.3 million on buildings and equipment. Money in: $5.3 million local (mostly property tax), $9.8 million state, $1.7 million federal. Long-term debt: $3.1 million.
Spent $12.4 million — $11.7 million to run schools, about $15,065 per student, plus $672,000 on buildings and equipment. Money in: $4.6 million local (mostly property tax), $6.5 million state, $1.1 million federal. Long-term debt: $3 million.
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 Nemaha County about $8.4 million a year on average in buildings, crops and lives. Ability to bounce back (community resilience): Very High; social vulnerability: Very Low.
Source: FEMA National Risk Index (December 2025), expected annual loss. Ratings compare counties nationwide; they're estimates, not predictions.
355 bridges in Nemaha County: 134 in good condition, 184 fair, and 37 poor (10.4%). “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.
| RS 1267 C-9 over SILVER CREEK · built 1983 | 342 vehicles a day |
| K236 HWY over HARRIS CREEK · built 1928 | 167 vehicles a day |
| RS 687 G-8 over HARRIS CREEK · built 1936 | 130 vehicles a day |
| RS 487 G-4 over TRIB. TO HARRIS CREEK · built 1936 | 106 vehicles a day |
| RS 1270 C-13 over TRIB. TO WOLF PEN CREEK · built 1928 | 106 vehicles a day |
| MINOR COL D-24 over STREAM · built 1940 | 100 vehicles a day |
Source: Federal Highway Administration, National Bridge Inventory (2025 submission). Includes state, county and city bridges.
Federal grants paid for $2.4 million of work in Nemaha County in fiscal 2025, about $233 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 Kansas 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 Nemaha 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 Nemaha County built: brayden.ozark@gmail.com.
More of Kansas: the state government and every county in Kansas.
Nearby counties: Brown County (23 mi) · Pawnee County, NE (27 mi) · Marshall County (27 mi) · Richardson County, NE (28 mi) · Jackson County (29 mi) · Pottawatomie County (33 mi).