352,867 people (2024 Census estimate, +1.9% since 2020)
1,181 square miles of land · 299 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.
75 active community water systems list Marion County in the area they serve, reporting 336,880 people served in all (a system that crosses county lines counts its whole population).
| SALEM PUBLIC WORKS surface water · local government · OR4100731 | 199,820 served |
| KEIZER, CITY OF groundwater · local government · OR4100744 | 38,585 served |
| WOODBURN, CITY OF groundwater · local government · OR4100959 | 29,455 served |
| SUBURBAN EAST SALEM WD buys surface water · local government · OR4100768 | 13,900 served |
| SILVERTON, CITY OF surface water · local government · OR4100823 | 10,484 served |
| CITY OF STAYTON surface water · local government · OR4100843 | 8,400 served |
| AUMSVILLE, CITY OF groundwater · local government · OR4100065 | 4,125 served |
| MOUNT ANGEL, CITY OF groundwater · local government · OR4100544 | 3,650 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 385 people were held in Marion County's jail, in Vera's latest figure (2023), or 173 per 100,000 residents ages 15–64. In 2018 it was about 403.
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.
11 school districts have their office in Marion County. School taxes are usually the largest part of a property tax bill.
Spent $870.1 million — $665.3 million to run schools, about $16,886 per student, plus $152.4 million on buildings and equipment. Money in: $207.6 million local (mostly property tax), $471.4 million state, $79.7 million federal. Long-term debt: $825.2 million.
Spent $109 million — $103.6 million to run schools, about $19,683 per student, plus $2.3 million on buildings and equipment. Money in: $19.3 million local (mostly property tax), $69.5 million state, $23.2 million federal. Long-term debt: $53.5 million.
Spent $79.7 million — $70.6 million to run schools, about $14,358 per student, plus $2 million on buildings and equipment. Money in: $40.4 million local (mostly property tax), $43 million state, $3.2 million federal. Long-term debt: $301.7 million.
Spent $63.9 million — $61 million to run schools, about $16,656 per student, plus $419,000 on buildings and equipment. Money in: $17.5 million local (mostly property tax), $41.8 million state, $4.2 million federal. Long-term debt: $65.1 million.
Spent $46.8 million — $43.1 million to run schools, about $16,042 per student, plus $1.8 million on buildings and equipment. Money in: $11.7 million local (mostly property tax), $31 million state, $4.1 million federal. Long-term debt: $14.8 million.
Spent $34.9 million — $31.1 million to run schools, about $14,887 per student, plus $1.3 million on buildings and equipment. Money in: $11.1 million local (mostly property tax), $21.1 million state, $3.3 million federal. Long-term debt: $41.9 million.
Spent $32 million — $29.1 million to run schools, about $17,332 per student, plus $239,000 on buildings and equipment. Money in: $7.6 million local (mostly property tax), $21.3 million state, $1.9 million federal. Long-term debt: $61.7 million.
Spent $22.3 million — $20.8 million to run schools, about $17,018 per student, plus $124,000 on buildings and equipment. Money in: $4.1 million local (mostly property tax), $15.9 million state, $2.1 million federal. Long-term debt: $9.2 million.
And 3 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 High compared with other U.S. counties. FEMA estimates natural hazards cost Marion County about $171.1 million a year on average in buildings, crops and lives. Ability to bounce back (community resilience): Relatively Moderate; social vulnerability: Relatively Moderate.
Source: FEMA National Risk Index (December 2025), expected annual loss. Ratings compare counties nationwide; they're estimates, not predictions.
375 bridges in Marion County: 84 in good condition, 262 fair, and 29 poor (7.7%). “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.
| WILCO ROAD over SALEM DITCH · built 1968 | 10,640 vehicles a day |
| W WASH ST over SALEM DITCH · built 1975 | 6,466 vehicles a day |
| OR 213 (HWY 160) over Abiqua Creek · built 1934 | 6,347 vehicles a day |
| RAMBLER DR SE over LITTLE PUDDING RIVER · built 1963 | 5,800 vehicles a day |
| WEST STAYTON RD over MILL CREEK · built 1966 | 3,417 vehicles a day |
| Marion Rd. SE over SIDNEY DITCH · built 1962 | 3,245 vehicles a day |
Source: Federal Highway Administration, National Bridge Inventory (2025 submission). Includes state, county and city bridges.
Federal grants paid for $1.1 billion of work in Marion County in fiscal 2025, about $3,118 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 Marion 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 Marion County built: brayden.ozark@gmail.com.
More of Oregon: the state government and every county in Oregon.
Nearby counties: Clackamas County (26 mi) · Linn County (28 mi) · Polk County (40 mi) · Yamhill County (43 mi) · Multnomah County (45 mi) · Benton County (50 mi).