Quick Facts
| County seat | Oregon City |
|---|---|
| Region | Portland Metro |
| Population (2020 Census) | 426,280 |
| Land & water area | 1,868 sq mi |
| Population density | 228.2 people per sq mi |
| Established | 1843 |
| Formed from | One of the original four districts of the Oregon Country |
| Name origin | Named for the Clackamas people, a local Native American tribe. |
| Incorporated cities | 16 |
| Main electric utility | Portland General Electric |
| FIPS code | 41005 |
| Official county website | clackamas.us |
About Clackamas County
Clackamas County 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.
Source: adapted from Wikipedia, available under CC BY-SA 4.0.
Cities in Clackamas County
| City | Population (2020) | Incorporated |
|---|---|---|
| Portland | 652,503 | 1851 |
| Lake Oswego | 40,732 | 1910 |
| Oregon City ★ | 37,572 | 1844 |
| Tualatin | 27,942 | 1913 |
| West Linn | 27,373 | 1913 |
| Wilsonville | 26,664 | 1969 |
| Happy Valley | 23,733 | 1965 |
| Milwaukie | 21,119 | 1903 |
| Canby | 18,171 | 1893 |
| Sandy | 12,612 | 1911 |
| Gladstone | 12,017 | 1911 |
| Molalla | 10,228 | 1913 |
| Estacada | 4,356 | 1905 |
| Rivergrove | 545 | 1971 |
| Johnson City | 539 | 1970 |
| Barlow | 133 | 1903 |
★ county seat. Cities that span more than one county are listed in each.