Clackamas County
Also known as Clackamas County, Oregon, Clackamas County, OR
county in Oregon, United States
Key facts
- Country
- United States
- State
- Oregon
- Founded
- July 5, 1843
- Named after
- Clackamas people
- Seat
- Oregon City
- Largest city
- Lake Oswego
- Total
- 1,883 sq mi (4,880 km )
- Land
- 1,870 sq mi (4,800 km )
- Water
- 13 sq mi (34 km ) 0.7%
- Estimate 2025
- 426,280
- Density
- 225/sq mi (87.0/km )
- Time zone
- UTC−8 ( Pacific )
- Summer dst
- UTC−7 ( PDT )
~15 min read
Article
Map of Clackamas County
Clackamas County (/ˈklækəməs/ CLAK-ə-məss) is one of the 36 counties in the U.S. state of Oregon. As of the 2020 census, the population was 421,401, making it Oregon's third-most populous county. Its county seat is Oregon City. The county was named after the native people living in the area at the time of the coming of Europeans, the Clackamas people, who are part of the Chinookan peoples.