Oregon's 4th congressional district represents the southern half of Oregon's coastal counties, including Coos, Curry, Lincoln, Lane, and Benton counties, alongside the northwestern half of Douglas County and a sliver of Linn County. It is centered around the state's two college towns, Eugene and Corvallis, homes to the University of Oregon and Oregon State University, respectively. Politically, the district leans slightly Democratic, due to the presence of Lane and Benton counties, home to over half the district's population. Lincoln County also tilts Democratic. Contrariwise, Douglas County is heavily Republican, as are to a lesser extent Coos and Curry. The district has been represented by Democrat Val Hoyle since 2023.

List of members representing the district

Recent statewide election results

Election results

Sources (official results only):

1994

1996

1998

2000

2002

2004

2006

2008

2010

2012

2014

2016

2018

2020

2022

Historical district boundaries

The district gained most of Josephine County from the 2nd district in the 2002 redistricting, but also lost most of the Grants Pass area to the second district.