425,857 people (2024 Census estimate, +0.8% since 2020)
1,871 square miles of land · 228 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.
87 active community water systems list Clackamas County in the area they serve, reporting 364,051 people served in all (a system that crosses county lines counts its whole population).
| SUNRISE WATER AUTHORITY buys surface water · local government · OR4100635 | 50,003 served |
| LAKE OSWEGO MUNICIPAL WATER buys surface water · local government · OR4100457 | 40,000 served |
| OREGON CITY buys surface water · local government · OR4101511 | 33,940 served |
| OAK LODGE WATER SERVICES buys surface water · local government · OR4101512 | 30,000 served |
| CLACKAMAS RIVER WATER surface water · local government · OR4100187 | 29,918 served |
| WEST LINN, CITY OF buys surface water · local government · OR4100944 | 28,000 served |
| WILSONVILLE, CITY OF surface water · local government · OR4100954 | 25,915 served |
| MILWAUKIE, CITY OF groundwater · local government · OR4100528 | 20,946 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 314 people were held in Clackamas County's jail, in Vera's latest figure (2023), or 118 per 100,000 residents ages 15–64. In 2018 it was about 468.
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 Clackamas County. School taxes are usually the largest part of a property tax bill.
Spent $301.8 million — $264.7 million to run schools, about $15,775 per student, plus $7.4 million on buildings and equipment. Money in: $161.8 million local (mostly property tax), $153.5 million state, $16.1 million federal. Long-term debt: $647.3 million.
Spent $227.6 million — $145.5 million to run schools, about $15,996 per student, plus $70.2 million on buildings and equipment. Money in: $100.2 million local (mostly property tax), $74.7 million state, $3.7 million federal. Long-term debt: $441.3 million.
Spent $122.9 million — $103.8 million to run schools, about $14,232 per student, plus $6.7 million on buildings and equipment. Money in: $48.1 million local (mostly property tax), $68 million state, $7.7 million federal. Long-term debt: $261.8 million.
Spent $191.7 million — $120.5 million to run schools, about $17,548 per student, plus $51.1 million on buildings and equipment. Money in: $101.3 million local (mostly property tax), $48.8 million state, $2.5 million federal. Long-term debt: $377.3 million.
Spent $66.3 million — $62.2 million to run schools, about $14,277 per student, plus $684,000 on buildings and equipment. Money in: $30.4 million local (mostly property tax), $39.3 million state, $3.5 million federal. Long-term debt: $76.1 million.
Spent $122.2 million — $70.8 million to run schools, about $16,682 per student, plus $45.3 million on buildings and equipment. Money in: $31.1 million local (mostly property tax), $45.4 million state, $6.1 million federal. Long-term debt: $105.8 million.
Spent $45.4 million — $41.6 million to run schools, about $13,460 per student, plus $2.8 million on buildings and equipment. Money in: $13.8 million local (mostly property tax), $31 million state, $2.2 million federal. Long-term debt: $13.9 million.
Spent $39.5 million — $37.6 million to run schools, about $14,601 per student, plus $276,000 on buildings and equipment. Money in: $11.8 million local (mostly property tax), $23.1 million state, $2.4 million federal. Long-term debt: $12 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 Clackamas County about $219.1 million a year on average in buildings, crops and lives. Ability to bounce back (community resilience): Relatively High; social vulnerability: Very Low.
Source: FEMA National Risk Index (December 2025), expected annual loss. Ratings compare counties nationwide; they're estimates, not predictions.
367 bridges in Clackamas County: 113 in good condition, 237 fair, and 17 poor (4.6%). “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.
| HOLLY LN over ABERNETHY CREEK · built 1933 | 9,700 vehicles a day |
| KROPF ROAD over ROCK CREEK · built 1958 | 5,600 vehicles a day |
| SNUFFIN RD over EAGLE CREEK · built 1956 | 5,000 vehicles a day |
| EAGLE FERN RD over NORTH FORK EAGLE CREEK · built 1956 | 4,400 vehicles a day |
| BARLOW RD over ROCK CREEK · built 1957 | 1,100 vehicles a day |
| BULL RUN RD over BULL RUN RIVER · built 1926 | 865 vehicles a day |
Source: Federal Highway Administration, National Bridge Inventory (2025 submission). Includes state, county and city bridges.
Federal grants paid for $284.4 million of work in Clackamas County in fiscal 2025, about $675 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 Clackamas 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 Clackamas County built: brayden.ozark@gmail.com.
More of Oregon: the state government and every county in Oregon.
Nearby counties: Marion County (26 mi) · Multnomah County (29 mi) · Hood River County (36 mi) · Clark County, WA (44 mi) · Linn County (49 mi) · Wasco County (50 mi).