Clackamas County, Oregon

Clackamas County, Oregon
County
Mount Hood Oregon City Municipal Elevator Timberline Lodge Willamette Falls Portland Oregon Temple Clackamas County Courthouse
Seal Logo
Location within the U.S. state of Oregon
Coordinates: 45°11′N 122°13′W
Country	United States
State	Oregon
Founded	July 5, 1843
Named for	Clackamas people
Seat	Oregon City
Largest city	Lake Oswego
Area
• Total	1,883 sq mi (4,880 km2)
• Land	1,870 sq mi (4,800 km2)
• Water	13 sq mi (34 km2)  0.7%
Population  (2020)
• Total	421,401
• Estimate  (2025)	426,280
• Density	225/sq mi (87.0/km2)
Time zone	UTC−8 (Pacific)
• Summer (DST)	UTC−7 (PDT)
Congressional districts	2nd, 3rd, 5th, 6th
Website	www.clackamas.us

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.

Clackamas County is part of the Portland-Vancouver-Hillsboro, OR-WA Metropolitan Statistical Area. It is in the Willamette Valley.