110,886 people (2024 Census estimate, +2.9% since 2020)
716 square miles of land · 155 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.
38 active community water systems list Yamhill County in the area they serve, reporting 86,093 people served in all (a system that crosses county lines counts its whole population).
| MCMINNVILLE WATER & LIGHT surface water · local government · OR4100497 | 34,515 served |
| NEWBERG, CITY OF groundwater · local government · OR4100557 | 25,138 served |
| SHERIDAN, CITY OF surface water · local government · OR4100811 | 6,494 served |
| LAFAYETTE, CITY OF buys surface water · local government · OR4100452 | 4,423 served |
| DUNDEE, CITY OF groundwater · local government · OR4100262 | 2,960 served |
| DAYTON, CITY OF groundwater · local government · OR4100252 | 2,535 served |
| CARLTON, CITY OF surface water · local government · OR4100171 | 2,270 served |
| WILLAMINA, CITY OF surface water · local government · OR4100953 | 2,239 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 109 people were held in Yamhill County's jail, in Vera's latest figure (2023), or 157 per 100,000 residents ages 15–64. In 2018 it was about 177.
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.
7 school districts have their office in Yamhill County. School taxes are usually the largest part of a property tax bill.
Spent $109.9 million — $100 million to run schools, about $15,368 per student, plus $4.9 million on buildings and equipment. Money in: $33 million local (mostly property tax), $68.5 million state, $12.4 million federal. Long-term debt: $125.8 million.
Spent $152.4 million — $69.2 million to run schools, about $16,461 per student, plus $77.7 million on buildings and equipment. Money in: $31.1 million local (mostly property tax), $45.3 million state, $6.9 million federal. Long-term debt: $159 million.
Spent $17.4 million — $14.5 million to run schools, about $13,131 per student, plus $1.3 million on buildings and equipment. Money in: $6.4 million local (mostly property tax), $10.8 million state, $1.1 million federal. Long-term debt: $17.3 million.
Spent $16 million — $15.5 million to run schools, about $16,343 per student, plus $65,000 on buildings and equipment. Money in: $3.8 million local (mostly property tax), $11.4 million state, $1.3 million federal.
Spent $15.1 million — $13.6 million to run schools, about $15,353 per student, plus $1.4 million on buildings and equipment. Money in: $3.8 million local (mostly property tax), $9.4 million state, $2.6 million federal. Long-term debt: $1.9 million.
Spent $19.4 million — $14.6 million to run schools, about $16,734 per student, plus $3.2 million on buildings and equipment. Money in: $5.4 million local (mostly property tax), $10.2 million state, $1.2 million federal. Long-term debt: $21 million.
Spent $16.2 million — $11.9 million to run schools, about $15,569 per student, plus $2.4 million on buildings and equipment. Money in: $4.7 million local (mostly property tax), $9.3 million state, $835,000 federal. Long-term debt: $3.7 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 Yamhill County about $55.7 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.
150 bridges in Yamhill County: 34 in good condition, 103 fair, and 13 poor (8.7%). “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.
| Hwy 29 over Yamhill Creek · built 1958 | 5,429 vehicles a day |
| HENDRICKS ROAD over HAWN CREEK · built 1964 | 3,288 vehicles a day |
| WEBFOOT ROAD over W. FK. PALMER CREEK · built 1959 | 566 vehicles a day |
| OLD MOORES VALLEY over HASKINS CREEK · built 1967 | 284 vehicles a day |
| BERRY CREEK ROAD over BERRY CREEK · built 1966 | 264 vehicles a day |
| GRAND ISLAND LOOP over MOSQUITO CREEK · built 1961 | 219 vehicles a day |
Source: Federal Highway Administration, National Bridge Inventory (2025 submission). Includes state, county and city bridges.
Federal grants paid for $32.7 million of work in Yamhill County in fiscal 2025, about $303 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 Oregon 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 Yamhill 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 Yamhill County built: brayden.ozark@gmail.com.
More of Oregon: the state government and every county in Oregon.
Nearby counties: Washington County (24 mi) · Polk County (24 mi) · Tillamook County (26 mi) · Marion County (43 mi) · Multnomah County (48 mi) · Columbia County (49 mi).