| Foster, Oregon | |
| Settlement Type: | Unincorporated community |
| Pushpin Map: | Oregon#USA |
| Pushpin Label: | Foster |
| Subdivision Type: | Country |
| Subdivision Name: | United States |
| Subdivision Type1: | State |
| Subdivision Name1: | Oregon |
| Subdivision Type2: | County |
| Subdivision Name2: | Linn |
| Unit Pref: | Imperial |
| Population As Of: | 2000 |
| Population Density Km2: | auto |
| Timezone: | Pacific (PST) |
| Utc Offset: | -8 |
| Timezone Dst: | PDT |
| Utc Offset Dst: | -7 |
| Elevation Ft: | 591 |
| Coordinates: | 44.4103°N -122.6722°W |
| Postal Code Type: | ZIP codes |
| Postal Code: | 97345 |
| Blank Name: | FIPS code |
| Blank1 Name: | GNIS feature ID |
| Blank1 Info: | 1136299 |
Foster is an unincorporated community partly within the city of Sweet Home in Linn County, Oregon. It is located on the western end of the Foster Reservoir. 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 U.S. Route 20.[1]
This region experiences warm 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.[2]