City of Seneca

106 Avenue A/P.O. Box 208
Seneca, OR 97873

Mayor: Andrea Coombs

Situated on the Silvies River, Seneca is in Bear Valley at the northern edge of the Great Basin. While early homesteaders moved into the valley in the late 1800s, Seneca began growing in the 1920s as a company town for the Edward Hines Lumber Company, boasting a sawmill and the northern terminus of a (now-vacated) railroad track which extended south to Burns, Oregon.

Seneca experiences the coolest weather in Grant County, Oregon and has the distinction of the coldest official temperature recorded in the Oregon: 54 degrees below zero. The main industries in Seneca are ranching and timber production.