172,347 people (2024 Census estimate, +2.5% since 2020)
414 square miles of land · 417 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.
17 active community water systems list Greene County in the area they serve, reporting 169,123 people served in all (a system that crosses county lines counts its whole population).
| GREENE CO.-NORTHWEST REG WATER groundwater · local government · OH2903512 | 41,895 served |
| FAIRBORN PUBLIC WATER SYSTEM groundwater · private · OH2900612 | 34,620 served |
| XENIA CITY PWS groundwater · local government · OH2902812 | 29,000 served |
| WRIGHT-PATTERSON AFB AREA A PWS groundwater · private · OH2903412 | 16,551 served |
| WRIGHT-PATTERSON AFB AREA B PWS groundwater · private · OH2903312 | 11,034 served |
| BELLBROOK WATER WORKS groundwater · private · OH2901112 | 9,475 served |
| WRIGHT STATE UNIVERSITY groundwater · private · OH2902012 | 8,948 served |
| GREENE COUNTY EASTERN REGIONAL PWS buys groundwater · local government · OH2906103 | 4,800 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 192 people were held in Greene County's jail, in Vera's latest figure (2023), or 177 per 100,000 residents ages 15–64. In 2018 it was about 312.
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.
8 school districts have their office in Greene County. School taxes are usually the largest part of a property tax bill.
Spent $115.8 million — $108.3 million to run schools, about $13,547 per student, plus $4 million on buildings and equipment. Money in: $95.5 million local (mostly property tax), $22.9 million state, $11.7 million federal. Long-term debt: $77.2 million.
Spent $107.3 million — $58.3 million to run schools, about $13,747 per student, plus $42 million on buildings and equipment. Money in: $37.5 million local (mostly property tax), $27.1 million state, $11.1 million federal. Long-term debt: $159 million.
Spent $67.6 million — $57.1 million to run schools, about $14,908 per student, plus $7 million on buildings and equipment. Money in: $34.8 million local (mostly property tax), $30.1 million state, $9.9 million federal. Long-term debt: $66.6 million.
Spent $37.4 million — $34.5 million to run schools, about $12,956 per student, plus $1.8 million on buildings and equipment. Money in: $31.6 million local (mostly property tax), $9 million state, $3.4 million federal. Long-term debt: $23.8 million.
Spent $17.8 million — $17 million to run schools, about $13,244 per student, plus $656,000 on buildings and equipment. Money in: $9.5 million local (mostly property tax), $7.5 million state, $1.8 million federal. Long-term debt: $8.2 million.
Spent $12 million — $11 million to run schools, about $16,891 per student, plus $553,000 on buildings and equipment. Money in: $8.2 million local (mostly property tax), $3.4 million state, $500,000 federal. Long-term debt: $2.2 million.
Spent $20.1 million — $17.2 million to run schools, about $28,758 per student, plus $1.9 million on buildings and equipment. Money in: $17.8 million local (mostly property tax), $9.6 million state, $555,000 federal. Long-term debt: $4.1 million.
Spent $9.1 million — $8 million to run schools, about $13,562 per student, plus $412,000 on buildings and equipment. Money in: $6.1 million local (mostly property tax), $3.9 million state, $1.1 million federal. Long-term debt: $6.4 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 Low compared with other U.S. counties. FEMA estimates natural hazards cost Greene County about $41.6 million a year on average in buildings, crops and lives. Ability to bounce back (community resilience): Very High; social vulnerability: Very Low.
Source: FEMA National Risk Index (December 2025), expected annual loss. Ratings compare counties nationwide; they're estimates, not predictions.
344 bridges in Greene County: 228 in good condition, 105 fair, and 11 poor (3.2%). “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.
| SB SR 4 over T168(UNION ROAD) · built 1959 | 10,605 vehicles a day |
| SR 835 over TRIB LIT BEAVER CREEK · built 1985 | 7,512 vehicles a day |
| SR 72 over CAESAR CREEK · built 1954 | 4,311 vehicles a day |
| SR 343 over TRIB YELLOW SPRINGS CRK · built 1956 | 2,409 vehicles a day |
| HEBBLE CREEK ROAD over HEBBLE CREEK · built 1976 | 1,000 vehicles a day |
| S PATTON ST over SHAWNEE CK & BIKE TRAIL · built 1976 | 200 vehicles a day |
Source: Federal Highway Administration, National Bridge Inventory (2025 submission). Includes state, county and city bridges.
Federal grants paid for $82.4 million of work in Greene County in fiscal 2025, about $491 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 Ohio 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 Greene 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 Greene County built: brayden.ozark@gmail.com.
More of Ohio: the state government and every county in Ohio.
Nearby counties: Clark County (17 mi) · Clinton County (19 mi) · Montgomery County (22 mi) · Warren County (23 mi) · Fayette County (25 mi) · Madison County (30 mi).