West Sacramento is a city in Yolo County, California, United States. The city is separated from Sacramento by the Sacramento River, which also separates Sacramento and Yolo counties. It is a fast-growing community; the population was 53,915 at the 2020 census, up from 48,744 at the 2010 census. The traditional industrial center of the region since the Gold Rush era, West Sacramento is home to a diverse economy and is one of the area's top four employment centers.

Yolo County, officially the County of Yolo, is a county located in the northern portion of the U.S. state of California. Yolo County was one of the original counties of California, created in 1850 at the time of statehood. As of the 2020 census, the population was 216,403. Its county seat is Woodland.