Oregon's congressional districts
The U.S. state of Oregon has had five United States congressional districts since 1982, when the Fifth District was added. Boundaries were redrawn following the population changes to each district as determined by the 1990, 2000, and 2010 Censuses. Although early projections suggested that Oregon might gain a sixth congressional district as a result of the 2010 Census, the state's population was about 42,000 people short of gaining a new district.
First District 
District 1 is in the northwest corner of the state and includes some of the Portland metropolitan area. It includes Clatsop County, Columbia County, Washington County, Yamhill County, and part of Multnomah County.
Second District 
District 2 is the largest of Oregon's districts — and the seventh largest district in the nation — covering roughly two-thirds of the state east of the Willamette Valley. It includes all of Baker, Crook, Deschutes, Gilliam, Grant, Harney, Hood River, Jackson, Jefferson, Klamath, Lake, Malheur, Morrow, Sherman, Umatilla, Union, Wallowa, Wasco, Wheeler counties and part of eastern Josephine County, including some of the Grants Pass area.
Third District 
Following the 2010 census, the district boundaries were changed slightly to add Downtown Portland from the 1st district and southwestern Multnomah County from the 5th district, and move part of Multnomah County near Mount Scott and part of northwestern Clackamas County (including most of the city of Milwaukie) to the 5th district.
Fourth District 
Fifth District 
District 5 stretches from the central coast through the state capital into southern suburbs of Portland and part of the summit of Mount Hood. It includes Lincoln County, Marion County, Polk County, Tillamook County, part of Benton County, the southern part of Clackamas County, and a small portion of Multnomah County near Mount Scott.
Following the 2010 census, the district boundaries were changed slightly to add part of Multnomah County near Mount Scott and northwestern Clackamas County (including most of the city of Milwaukie) from the 3rd district, and move southwestern Multnomah County to the 3rd district.
See also 
- Brace, Kimball (December 22, 2008). "New Population Estimates Show Slight Changes For 2008 Congressional Apportionment, But Point to Major Changes for 2010". Election Data Services, Inc. Retrieved 2008-12-27.
- Saker, Anne (December 21, 2010). "Census shows Oregon's population robust but clearly slowing by 2010". The Oregonian. Retrieved July 27, 2011.
- Mapes, Jeff (June 29, 2011). "Oregon legislators reach agreement on congressional redistricting". The Oregonian. Retrieved July 27, 2011.
- "Oregon's Congressional Districts (Senate Bill 990)". Oregon Legislative Assembly. Retrieved July 27, 2011.