Yolo County ( ; Wintun: Yo-loy), officially the County of Yolo, is a county located in the northern portion of the U.S. state of California. As of the 2020 census, the population was 216,403. Its county seat is Woodland.Yolo County is included in the Greater Sacramento metropolitan area and is located in the Sacramento Valley.
The majority of Yolo County remains a relatively rural agricultural region.