West Linn is a city in Clackamas County, Oregon, United States. Now a southern suburb within the Portland metropolitan area, West Linn has a history of early development, prompted by the opportunity to harvest energy from nearby Willamette Falls. It was named after U.S. Senator Lewis F. Linn of Ste. Genevieve, Missouri, who had advocated the American occupation of Oregon as a counterclaim to the British. As of the 2010 census, the city had a population of 25,109.

Prior to settlement by Oregon pioneers, the area which became known as West Linn was the home of ancestors of some of the present-day Confederated Tribes of the Grand Ronde Community of Oregon.

Major Robert Moore was an early settler arriving in 1839—before the Champoeg Meetings—having been the senior member of the first attempt to create an American state in Oregon, the Peoria Party. Sometime after journeying around the Willamette Valley and Columbia Basin, Moore bought title to approx. 1,000 acres (400 ha) on the west side of Willamette Falls, across the Willamette River from Oregon City, from a local Native American chief, on which he platted a town he called "Robin's Nest" in early 1843. He also filed a provisional claim with the then government of the Oregon Country, not knowing if his transaction would be honored by the eventual governing laws. The Oregon Territorial Legislature voted to rename it Linn City on December 22, 1845 as a memorial to Senator Lewis F. Linn after whom Linn County is also named. Linn was a neighbor and family friend of the Moores from their time as settlers in the early Missouri Territory.

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