795,897 people (2024 Census estimate, −2.5% since 2020)
431 square miles of land · 1,847 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.
25 active community water systems list Multnomah County in the area they serve, reporting 846,579 people served in all (a system that crosses county lines counts its whole population).
| PORTLAND WATER BUREAU surface water · local government · OR4100657 | 666,200 served |
| GRESHAM, CITY OF buys surface water · local government · OR4100357 | 73,932 served |
| ROCKWOOD PUD buys surface water · local government · OR4100668 | 65,443 served |
| TROUTDALE, CITY OF groundwater · local government · OR4100901 | 16,185 served |
| FAIRVIEW, CITY OF groundwater · local government · OR4100296 | 9,963 served |
| WOOD VILLAGE, CITY OF groundwater · local government · OR4100904 | 4,388 served |
| CORBETT WATER DISTRICT surface water · local government · OR4100359 | 2,954 served |
| PLEASANT HOME WATER DISTRICT buys surface water · local government · OR4100360 | 1,510 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 932 people were held in Multnomah County's jail, in Vera's latest figure (2024), or 167 per 100,000 residents ages 15–64. In 2019 it was about 1,073.
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.
9 school districts have their office in Multnomah County. School taxes are usually the largest part of a property tax bill.
Spent $1.3 billion — $921.8 million to run schools, about $20,603 per student, plus $289.6 million on buildings and equipment. Money in: $647 million local (mostly property tax), $365.8 million state, $109.8 million federal. Long-term debt: $1.7 billion.
Spent $199.3 million — $183.1 million to run schools, about $16,024 per student, plus $5.4 million on buildings and equipment. Money in: $63.6 million local (mostly property tax), $123 million state, $17.4 million federal. Long-term debt: $304.8 million.
Spent $208.9 million — $193.9 million to run schools, about $19,654 per student, plus $2.6 million on buildings and equipment. Money in: $53.3 million local (mostly property tax), $116.7 million state, $31.2 million federal. Long-term debt: $155.5 million.
Spent $201.1 million — $187.1 million to run schools, about $21,491 per student, plus $10.4 million on buildings and equipment. Money in: $31.8 million local (mostly property tax), $148.6 million state, $26.2 million federal. Long-term debt: $53.8 million.
Spent $133 million — $95.6 million to run schools, about $17,337 per student, plus $34.1 million on buildings and equipment. Money in: $24.7 million local (mostly property tax), $69.1 million state, $14.7 million federal. Long-term debt: $63.5 million.
Spent $49.9 million — $45.3 million to run schools, about $15,887 per student, plus $4,000 on buildings and equipment. Money in: $28 million local (mostly property tax), $19.7 million state, $6.3 million federal. Long-term debt: $89.9 million.
Spent $19.9 million — $16.1 million to run schools, about $15,236 per student, plus $3.3 million on buildings and equipment. Money in: $3.4 million local (mostly property tax), $14.1 million state, $0 federal. Long-term debt: $3.7 million.
Spent $12.5 million — $12 million to run schools, about $20,077 per student, plus $24,000 on buildings and equipment. Money in: $9.5 million local (mostly property tax), $4.6 million state, $142,000 federal. Long-term debt: $13.5 million.
And 1 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 Multnomah County about $440.4 million a year on average in buildings, crops and lives. Ability to bounce back (community resilience): Very High; social vulnerability: Relatively Low.
Source: FEMA National Risk Index (December 2025), expected annual loss. Ratings compare counties nationwide; they're estimates, not predictions.
473 bridges in Multnomah County: 56 in good condition, 405 fair, and 12 poor (2.5%). “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.
| NW BROADWAY RAMP over BROADWAY ST CONN · built 1913 | 30,388 vehicles a day |
| Hwy 123 over BNSF · built 1909 | 14,374 vehicles a day |
| COLUMBIA BLVD over B-78 OVER BNRR · built 1909 | 13,910 vehicles a day |
| I-84 (HWY 002) EB over MCCORD CREEK · built 1962 | 13,746 vehicles a day |
| N BURGARD ST over B-1 OVER UP/SPRR · built 1930 | 13,113 vehicles a day |
| HWY 1W (STEEL BR) over WILLAMETTE RIVER · built 1910 | 11,732 vehicles a day |
Source: Federal Highway Administration, National Bridge Inventory (2025 submission). Includes state, county and city bridges.
Federal grants paid for $728 million of work in Multnomah County in fiscal 2025, about $893 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 Multnomah 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 Multnomah County built: brayden.ozark@gmail.com.
More of Oregon: the state government and every county in Oregon.
Nearby counties: Clark County, WA (16 mi) · Clackamas County (29 mi) · Washington County (33 mi) · Hood River County (37 mi) · Skamania County, WA (40 mi) · Columbia County (42 mi).