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is a city in Deschutes County, Oregon, United States. It is part of the Bend, Oregon Metropolitan Statistical Area. The population was 959 at the 2000 census, but has grown to 1,750 as of 2008.
Camp Polk was established as a military post in 1865 in response to the Paiute Indian wars that were raging throughout eastern Oregon during the 1860s and 70s.
Named after the Oregon county from which the camp’s commanding officer hailed, it consisted of a group of cabins along the west bank of Squaw Creek, about three miles northeast of Sisters. The troops spent the winter of 1865-66 there. After discovering that there was no Indian problem they left. Around 1870, the area was homesteaded by Samuel Hindeman who also ran the post office. The post office at Camp Polk was moved to the present site of Sisters in 1888, and the name was changed to Sisters after the Three Sisters mountains that dominate its western skyline.