West Linn is located in Clackamas County, Oregon. 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.

The median income for a household in the city was $72,010, and the median income for a family was $83,252 (These figures had risen to $94,844 and $108,821 respectively as of a 2007 estimate). Males had a median income of $61,458 versus $38,733 for females. The per capita income for the city was $34,671, among the state’s top five. About 2.9% of families and 3.9% of the population were below the poverty line, including 3.6% of those under age 18 and 4.2% of those age 65 or over.