Sammamish/səˈmæ.mɪʃ/ is a city in King County, Washington, United States. The population was 45,780 at the 2010 census. Sammamish ranked 15th in CNN Cash Money magazine's 2011 review of the best places to live in the United States. Forbes ranked Sammamish, in, 2012, as the friendliest town in the United States.