Map of Jefferson County, Oregon

Jefferson County is one of the 36 counties in the U.S. state of Oregon. At the 2020 census, the population was 24,502. The county seat is Madras. The county is named after Mount Jefferson.

Jefferson County overview:
Name:	Jefferson County
FIPS code:	41-031
State:	Oregon
Founded:	December 12, 1914
Named for:	Mount Jefferson
Seat:	Madras
Largest city:	Madras
Total Area:	1,791 sq mi (4,640 km²)
Land Area:	1,781 sq mi (4,610 km²)
Total Population:	24,502
Population Density:	12/sq mi (5/km²)
Time zone:	UTC−8 (Pacific)
Summer Time Zone (DST):	UTC−7 (PDT)
Website:	www.co.jefferson.or.us

Jefferson County location map. Where is Jefferson County?

Jefferson County location on the U.S. Map. Where is Jefferson County. — Location of Jefferson County in the the United States.

Jefferson County location on the Oregon map. Where is Jefferson County. — Location of Jefferson County in Oregon.

History

Jefferson County was created on December 12, 1914, from a portion of Crook County. The county owes much of its agricultural prosperity to the railroad, which links Madras with the Columbia River, and was completed in 1911, and to the development of irrigation projects in the late 1930s. The railroad was completed despite constant feuds and battles between two lines working on opposite sides of the Deschutes River.

Madras was incorporated in 1911, and has been the permanent county seat since a general election in 1916. The first (temporary) county seat was Culver, which was selected by a three-man commission appointed by the governor. Due to repeated tie votes over several days (with one vote each cast for Culver, Metolius and Madras). The deadlock was eventually broken by allowing the Metolius Commissioner to post the tie-breaker, by voting for Culver.

Rapid development in adjacent Deschutes County during the 1990s had farmers in Jefferson County concerned that they might be priced out of their own farmlands, which could be replaced by destination resorts, golf courses and other amenities for recent arrivals.

Jefferson County Road Map

Jefferson CountyStreet Map. — Street map of Jefferson County, Oregon. Source: OpenStreetMap (OSM)

Jefferson CountyMap — Jefferson Countypolitical map.

Geography

According to the United States Census Bureau, the county has a total area of 1,791 square miles (4,640 km), of which 1,781 square miles (4,610 km) is land and 10 square miles (26 km) (0.6%) is water.