169,418 people (2024 Census estimate, +0.3% since 2020)
152 square miles of land · 1,117 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.
2 active community water systems list Wyandotte County in the area they serve, reporting 160,765 people served in all (a system that crosses county lines counts its whole population).
| KANSAS CITY BOARD OF PUBLIC UTILITIES groundwater (surface-influenced) · local government · KS2020906 | 152,960 served |
| BONNER SPRINGS, CITY OF buys groundwater · local government · KS2020904 | 7,805 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 428 people were held in Wyandotte County's jail, in Vera's latest figure (2022), or 404 per 100,000 residents ages 15–64. In 2017 it was about 396.
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.
4 school districts have their office in Wyandotte County. School taxes are usually the largest part of a property tax bill.
Spent $409.8 million — $387.7 million to run schools, about $17,611 per student, plus $13.9 million on buildings and equipment. Money in: $58.2 million local (mostly property tax), $256.7 million state, $96.8 million federal. Long-term debt: $278.9 million.
Spent $61.1 million — $51.8 million to run schools, about $13,315 per student, plus $7.5 million on buildings and equipment. Money in: $10.3 million local (mostly property tax), $48 million state, $8.2 million federal. Long-term debt: $57.8 million.
Spent $53.8 million — $33.5 million to run schools, about $12,062 per student, plus $16.3 million on buildings and equipment. Money in: $16.2 million local (mostly property tax), $23.9 million state, $1.5 million federal. Long-term debt: $50.8 million.
Spent $38.3 million — $34.9 million to run schools, about $13,837 per student, plus $1.8 million on buildings and equipment. Money in: $11.5 million local (mostly property tax), $27.3 million state, $3 million federal. Long-term debt: $44.4 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: Relatively Moderate compared with other U.S. counties. FEMA estimates natural hazards cost Wyandotte County about $68.5 million a year on average in buildings, crops and lives. Ability to bounce back (community resilience): Relatively Moderate; social vulnerability: Relatively Moderate.
Source: FEMA National Risk Index (December 2025), expected annual loss. Ratings compare counties nationwide; they're estimates, not predictions.
316 bridges in Wyandotte County: 199 in good condition, 108 fair, and 9 poor (2.8%). “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-70 EB HIGHWAY over KANSAS RIVER 3 RR 5 ST · built 1907 | 20,421 vehicles a day |
| 69 HWY (18TH ST) over KS RIV RR LEVEE RDS · built 1959 | 14,785 vehicles a day |
| US69 18TH ST EXPY over MERRIAM LN TURKEY CREEK · built 1959 | 12,588 vehicles a day |
| US-169 HIGHWAY NB over KS RIVER RR YARD 3 STR · built 1933 | 12,466 vehicles a day |
| K-32 HIGHWAY over BETTS CREEK DRAINAGE · built 1971 | 7,200 vehicles a day |
| SB FAIRFAX TO70EB over 6 STREETS & 4 RR TRACKS · built 1959 | 5,455 vehicles a day |
Source: Federal Highway Administration, National Bridge Inventory (2025 submission). Includes state, county and city bridges.
Federal grants paid for $178.4 million of work in Wyandotte County in fiscal 2025, about $1,054 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 Wyandotte 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 Wyandotte County built: brayden.ozark@gmail.com.
More of Kansas: the state government and every county in Kansas.
Nearby counties: Leavenworth County (16 mi) · Johnson County (16 mi) · Platte County, MO (18 mi) · Clay County, MO (23 mi) · Jackson County, MO (24 mi) · Douglas County (32 mi).