Foster is a community partly within the city of Sweet Home

Sweet Home, Oregon

Sweet Home is a city in Linn County, Oregon, United States. The population was 8,016 at the 2000 census. Sweet Home is sometimes referred to as the "Gateway to the Santiam Playground", due to its proximity to nearby lakes, rivers and the Cascade Mountains....

 in Linn County

Linn County, Oregon

Linn County is a county located in the U.S. state of Oregon. It is named in honor of Lewis F. Linn, a U.S. Senator from Missouri who advocated the American occupation of the Oregon Country. By the 2010 US census the population of Linn county was 116,672 showing a 13.2% growth since the 2000 census...

, Oregon

Oregon

Oregon is a state in the Pacific Northwest region of the United States. It is located on the Pacific coast, with Washington to the north, California to the south, Nevada on the southeast and Idaho to the east. The Columbia and Snake rivers delineate much of Oregon's northern and eastern...

, United States

United States

The United States of America is a federal constitutional republic comprising fifty states and a federal district...

. It is located on the western end of the Foster Reservoir

Foster Reservoir

Foster Reservoir is a reservoir created by Foster Dam on the South Santiam River near the city of Sweet Home, Oregon, United States. The reservoir is approximately 5.6 km long and contains approximately 494 ha when full. Primary use of the reservoir is recreation in the summer and flood...

. A post office named Foster serves ZIP code

ZIP Code

ZIP codes are a system of postal codes used by the United States Postal Service since 1963. The term ZIP, an acronym for Zone Improvement Plan, is properly written in capital letters and was chosen to suggest that the mail travels more efficiently, and therefore more quickly, when senders use the...

 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

Middle Santiam River

The Middle Santiam River is a tributary of the South Santiam River, long, in western Oregon in the United States. It drains a remote area of the Cascade Range east of Corvallis in the watershed of the Willamette River....

 to the west end of Green Peter Lake; on the south, the area extends for several miles along the South Santiam River

South Santiam River

The South Santiam River is a tributary of the Santiam River, about long, in western Oregon in the United States. It drains an area of the Cascade Range into the Willamette Valley east of Corvallis....

 and Santiam Highway.