17,877 people (2024 Census estimate, +4.3% since 2020)
541 square miles of land · 33 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 Dallas County in the area they serve, reporting 4,071 people served in all (a system that crosses county lines counts its whole population).
| BUFFALO PWS groundwater · local government · MO5010114 | 3,462 served |
| URBANA PWS groundwater · local government · MO5010807 | 409 served |
| LOUISBURG PWS groundwater · local government · MO5011068 | 122 served |
| SUNSHINE ESTATES groundwater · private · MO5031606 | 48 served |
| RED TOP PARK groundwater · private · MO5041253 | 30 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 25 people were held in Dallas County's jail, in Vera's latest figure (2019), or 247 per 100,000 residents ages 15–64. In 2014 it was about 25.
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.
1 school district has its office in Dallas County. School taxes are usually the largest part of a property tax bill.
Spent $24 million — $21.2 million to run schools, about $11,875 per student, plus $1.9 million on buildings and equipment. Money in: $7.7 million local (mostly property tax), $11.6 million state, $6.9 million 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 Dallas County about $10.4 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.
114 bridges in Dallas County: 28 in good condition, 75 fair, and 11 poor (9.6%). “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.
| MO 73 S over LITTLE NIANGUA CR · built 1925 | 2,052 vehicles a day |
| PARK ACCESS RD over BENNETT SPR BR · built 1900 | 1,000 vehicles a day |
| MO 64 E over NIANGUA RVR · built 1931 | 976 vehicles a day |
| RT D E over THOMAS CR · built 1974 | 641 vehicles a day |
| RT C E over LINDLEY CR · built 1961 | 495 vehicles a day |
| E MAIN ST over GREASY CR · built 1949 | 100 vehicles a day |
Source: Federal Highway Administration, National Bridge Inventory (2025 submission). Includes state, county and city bridges.
Federal grants paid for $1.1 million of work in Dallas County in fiscal 2025, about $62 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 Dallas 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 Dallas County built: brayden.ozark@gmail.com.
More of Missouri: the state government and every county in Missouri.
Nearby counties: Polk County (21 mi) · Hickory County (24 mi) · Laclede County (24 mi) · Camden County (28 mi) · Webster County (29 mi) · Greene County (34 mi).