West Sacramento (also known as West Sac) is a city in Yolo County, California. It is contiguous with Sacramento, but is separated by the Sacramento River which is also the county line, so West Sacramento is in a different county than Sacramento. It is a fast growing community; the population was 48,744 at the 2010 census, up from 31,615 at the 2000 census.
West Sacramento is part of the Sacramento–Arden Arcade–Roseville Metropolitan Statistical Area which has a population (2000) of approximately 1,796,857. Major industries to the region include agriculture and transportation.