Foster, Oregon

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Unincorporated community
Foster Elementary School
Foster Elementary School
Foster is located in Oregon
Foster is located in the US
Location within the state of Oregon
Coordinates: 44°24′37″N 122°40′20″W / 44.41028°N 122.67222°W / 44.41028; -122.67222Coordinates: 44°24′37″N 122°40′20″W / 44.41028°N 122.67222°W / 44.41028; -122.67222
Country United States
State Oregon
County Linn
Time zone Pacific (PST) (UTC-8)
 • Summer (DST) PDT (UTC-7)
ZIP codes 97345
GNIS feature ID 1136299

Foster is an unincorporated community partly within the city of Sweet Home in Linn County, Oregon, United States. It is located on the western end of the Foster Reservoir.[1] A post office named Foster serves ZIP code 97345, which serves areas beyond the Sweet Home city limits on both the north and south sides of Foster Lake: on the north side, the area extends along the Middle Santiam River to the west end of Green Peter Lake; on the south, the area extends for several miles along the South Santiam River and Santiam Highway.[2]


This region experiences warm (but not hot) and dry summers, with no average monthly temperatures above 71.6 °F. According to the Köppen Climate Classification system, Foster has a warm-summer Mediterranean climate, abbreviated "Csb" on climate maps.[3]