9,766 people (2024 Census estimate, +0.1% since 2020)
435 square miles of land · 22 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.
5 active community water systems list Grundy County in the area they serve, reporting 10,160 people served in all (a system that crosses county lines counts its whole population).
| TRENTON MUNICIPAL UTILITIES PWS surface water · local government · MO2010796 | 5,600 served |
| GRUNDY COUNTY PWSD 1 buys surface water · local government · MO2024237 | 3,900 served |
| SPICKARD PWS buys surface water · local government · MO2010753 | 254 served |
| LAREDO PWS buys groundwater · local government · MO2010452 | 240 served |
| GALT PWS buys surface water · local government · MO2010300 | 166 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 20 people were held in Grundy County's jail, in Vera's latest figure (2019), or 351 per 100,000 residents ages 15–64. In 2014 it was about 26.
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.
5 school districts have their office in Grundy County. School taxes are usually the largest part of a property tax bill.
Spent $14.2 million — $13 million to run schools, about $11,798 per student, plus $516,000 on buildings and equipment. Money in: $6.2 million local (mostly property tax), $6.5 million state, $2 million federal. Long-term debt: $9.8 million.
Spent $2.1 million — $1.8 million to run schools, about $11,673 per student, plus $111,000 on buildings and equipment. Money in: $918,000 local (mostly property tax), $1 million state, $120,000 federal.
Spent $3 million — $2.7 million to run schools, about $20,794 per student, plus $195,000 on buildings and equipment. Money in: $1.2 million local (mostly property tax), $1.3 million state, $454,000 federal.
Spent $1.2 million — $1 million to run schools, about $21,851 per student, plus $62,000 on buildings and equipment. Money in: $558,000 local (mostly property tax), $492,000 state, $269,000 federal.
Spent $1.1 million — $720,000 to run schools, about $40,000 per student, plus $210,000 on buildings and equipment. Money in: $367,000 local (mostly property tax), $477,000 state, $366,000 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 Grundy County about $7.7 million a year on average in buildings, crops and lives. Ability to bounce back (community resilience): Relatively Moderate; social vulnerability: Relatively High.
Source: FEMA National Risk Index (December 2025), expected annual loss. Ratings compare counties nationwide; they're estimates, not predictions.
185 bridges in Grundy County: 103 in good condition, 64 fair, and 18 poor (9.7%). “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.
| RT E E over MEDICINE CR DRAIN · built 1947 | 272 vehicles a day |
| RT B E over MUDDY CR · built 1952 | 260 vehicles a day |
| RT C E over WELDON FK GRAND RV · built 1936 | 201 vehicles a day |
| SE 20TH ST over NO CR · built 1930 | 30 vehicles a day |
| NE 105TH ST over UNNAMED STREAM · built 1991 | 20 vehicles a day |
| NE 105TH ST over TRIB W FK MEDICINE · built 1991 | 20 vehicles a day |
Source: Federal Highway Administration, National Bridge Inventory (2025 submission). Includes state, county and city bridges.
Federal grants paid for $8.9 million of work in Grundy County in fiscal 2025, about $911 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 Missouri 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 Grundy 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 Grundy County built: brayden.ozark@gmail.com.
More of Missouri: the state government and every county in Missouri.
Nearby counties: Mercer County (21 mi) · Livingston County (23 mi) · Daviess County (24 mi) · Sullivan County (25 mi) · Harrison County (28 mi) · Linn County (30 mi).