107,256 people (2024 Census estimate, +2.3% since 2020)
923 square miles of land · 116 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.
41 active community water systems list Franklin County in the area they serve, reporting 66,202 people served in all (a system that crosses county lines counts its whole population).
| WASHINGTON PWS groundwater · local government · MO6010838 | 14,068 served |
| UNION PWS groundwater · local government · MO6010801 | 12,348 served |
| FRANKLIN COUNTY PWSD 3 groundwater · local government · MO6024213 | 8,250 served |
| SULLIVAN PWS groundwater · local government · MO6010775 | 7,081 served |
| PACIFIC PWS groundwater · local government · MO6010620 | 6,000 served |
| ST CLAIR PWS groundwater · local government · MO6010708 | 4,700 served |
| FRANKLIN COUNTY PWSD 1 groundwater · local government · MO6024211 | 3,500 served |
| NEW HAVEN PWS groundwater · local government · MO6010568 | 2,000 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 177 people were held in Franklin County's jail, in Vera's latest figure (2019), or 267 per 100,000 residents ages 15–64. In 2014 it was about 115.
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.
10 school districts have their office in Franklin County. School taxes are usually the largest part of a property tax bill.
Spent $62.6 million — $51 million to run schools, about $13,697 per student, plus $7.4 million on buildings and equipment. Money in: $47 million local (mostly property tax), $14.8 million state, $7.4 million federal. Long-term debt: $68.9 million.
Spent $42.5 million — $37 million to run schools, about $11,722 per student, plus $2.9 million on buildings and equipment. Money in: $20.9 million local (mostly property tax), $20.6 million state, $4.5 million federal. Long-term debt: $42.9 million.
Spent $50 million — $39.8 million to run schools, about $13,056 per student, plus $7.3 million on buildings and equipment. Money in: $25.1 million local (mostly property tax), $17.8 million state, $5.7 million federal. Long-term debt: $41.2 million.
Spent $33.8 million — $28.1 million to run schools, about $12,608 per student, plus $4.2 million on buildings and equipment. Money in: $13.1 million local (mostly property tax), $14.7 million state, $3.7 million federal. Long-term debt: $13.9 million.
Spent $25.8 million — $23.3 million to run schools, about $11,030 per student, plus $1.6 million on buildings and equipment. Money in: $12.2 million local (mostly property tax), $12.2 million state, $4 million federal. Long-term debt: $9.4 million.
Spent $6.3 million — $5.9 million to run schools, about $11,661 per student, plus $297,000 on buildings and equipment. Money in: $3.6 million local (mostly property tax), $3 million state, $886,000 federal. Long-term debt: $1.9 million.
Spent $5.9 million — $4.4 million to run schools, about $13,314 per student, plus $403,000 on buildings and equipment. Money in: $2.5 million local (mostly property tax), $2.9 million state, $965,000 federal. Long-term debt: $2.7 million.
Spent $3.7 million — $2.6 million to run schools, about $11,977 per student, plus $356,000 on buildings and equipment. Money in: $1.8 million local (mostly property tax), $1.8 million state, $218,000 federal. Long-term debt: $1.1 million.
And 2 more.
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 Franklin County about $59.5 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.
329 bridges in Franklin County: 130 in good condition, 186 fair, and 13 poor (4.0%). “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.
| IS 44 E over BR OF BOURBEUSE RV · built 1949 | 36,909 vehicles a day |
| RT D S over IS 44 · built 1969 | 9,463 vehicles a day |
| RT MM S over LABADIE CR · built 1950 | 2,879 vehicles a day |
| RT OO S over LIT FOX CR · built 1957 | 2,453 vehicles a day |
| OLD STATE RD over JORDAN BR OF ST JO · built 1997 | 1,250 vehicles a day |
| OLD HWY 100 over DUBOIS CR · built 1939 | 1,000 vehicles a day |
Source: Federal Highway Administration, National Bridge Inventory (2025 submission). Includes state, county and city bridges.
Federal grants paid for $27.4 million of work in Franklin County in fiscal 2025, about $262 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 Franklin 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 Franklin County built: brayden.ozark@gmail.com.
More of Missouri: the state government and every county in Missouri.
Nearby counties: Gasconade County (23 mi) · Warren County (25 mi) · Jefferson County (31 mi) · St. Charles County (33 mi) · Crawford County (33 mi) · Washington County (34 mi).