Oregon's 1st congressional district is a congressional district located in the U.S state of Oregon. The district stretches from Portland's western suburbs and exurbs, to parts of the Oregon coast. The district includes the principal cities of Beaverton, Hillsboro, and Tigard, all located in the Portland metropolitan area. Geographically, the district is located in the northwest corner of Oregon. It includes all of Clatsop, Columbia and Tillamook Counties, most of Washington County excluding the extreme southeast, and a portion of southwest Multnomah County in Portland. It generally includes most of Portland west of the Williamette River.
The district has been represented by Democrat Suzanne Bonamici since 2012. Bonamici won a special election to replace David Wu, who resigned in the wake of accusations of sexual misconduct.
The district was a Democratic-leaning swing district for much of the 1990s, with a number of competitive contests after 18-year incumbent Democrat Les AuCoin gave up the seat to run for United States Senate in 1992. However, since the district was pushed further into Portland after the 2000 census, it has been much safer for the Democrats; the Republicans have only managed 40 percent of the vote once since 2003. With a Cook Partisan Voting Index of D+20, it is the second-most Democratic district in the state, behind only the neighboring 3rd district covering most of the rest of Portland. It is the fourth most Democratic district in the Pacific Northwest, only Washington's 7th and 9th districts and Oregon's 3rd are more Democratic.
For the 118th and successive Congresses (based on redistricting following the 2020 census), the district contains all or portions of the following counties and communities:
Clatsop County (11)
Columbia County (9)
Multnomah County (1)
Tillamook County (21)
Washington County (22)
Sources (official results only):
A special election was held on January 31, 2012, to replace the most recent incumbent David Wu, who created a vacancy in the office with his resignation effective August 3, 2011. The winner of the election, Suzanne Bonamici, served the remainder of Wu's two-year term.
Following the 2000 United States census, the district gained some of Multnomah County, which had previously been part of the 3rd district. After the 2010 United States census, the district boundaries were changed to move Downtown Portland from the 1st to the 3rd district.