5,572 people (2024 Census estimate, +0.8% since 2020)
895 square miles of land · 6 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.
12 active community water systems list Washington County in the area they serve, reporting 5,258 people served in all (a system that crosses county lines counts its whole population).
| WASHINGTON CO RWD 1 groundwater · local government · KS2020107 | 1,093 served |
| WASHINGTON, CITY OF groundwater · local government · KS2020101 | 1,065 served |
| HANOVER, CITY OF buys groundwater · local government · KS2020108 | 689 served |
| WASHINGTON CO RWD 2 groundwater · local government · KS2020113 | 673 served |
| CLIFTON, CITY OF groundwater · local government · KS2002709 | 455 served |
| LINN, CITY OF groundwater · local government · KS2020104 | 382 served |
| GREENLEAF, CITY OF groundwater · local government · KS2020106 | 347 served |
| BARNES, CITY OF groundwater · local government · KS2020110 | 161 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 36 people were held in Washington County's jail, in Vera's latest figure (2019), or 1,130 per 100,000 residents ages 15–64. In 2014 it was about 5.
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 Washington County. School taxes are usually the largest part of a property tax bill.
Spent $6.1 million — $5.9 million to run schools, about $12,016 per student, plus $165,000 on buildings and equipment. Money in: $2.2 million local (mostly property tax), $4 million state, $616,000 federal.
Spent $8.5 million — $6.1 million to run schools, about $16,503 per student, plus $2.3 million on buildings and equipment. Money in: $2.1 million local (mostly property tax), $3.9 million state, $1.2 million federal. Long-term debt: $1.6 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 Washington County about $6.9 million a year on average in buildings, crops and lives. Ability to bounce back (community resilience): Relatively High; social vulnerability: Relatively Low.
Source: FEMA National Risk Index (December 2025), expected annual loss. Ratings compare counties nationwide; they're estimates, not predictions.
335 bridges in Washington County: 189 in good condition, 134 fair, and 12 poor (3.6%). “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 1104 P-24.2 over TRIB. TO PEATS CREEK · built 1925 | 460 vehicles a day |
| K22 HWY over MULBERRY CREEK · built 1949 | 232 vehicles a day |
| 13-K.7 329 over MELVIN CREEK · built 1950 | 40 vehicles a day |
| 8.6-AA.1 335 over TRIB TO LITTLE BLUE RV · built 1940 | 40 vehicles a day |
| O-14.6 159 over TRIB. TO CAMP CREEK · built 1920 | 30 vehicles a day |
| Q-2.8 33 over JOY CREEK · built 1975 | 30 vehicles a day |
Source: Federal Highway Administration, National Bridge Inventory (2025 submission). Includes state, county and city bridges.
Federal grants paid for $1.2 million of work in Washington County in fiscal 2025, about $218 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 Washington 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 Washington County built: brayden.ozark@gmail.com.
More of Kansas: the state government and every county in Kansas.
Nearby counties: Jefferson County, NE (28 mi) · Republic County (30 mi) · Clay County (30 mi) · Marshall County (30 mi) · Cloud County (35 mi) · Thayer County, NE (38 mi).