Yolo County is a county located in the northern part of the U.S. state of California, bordered by the other counties of Sacramento, Solano, Napa, Lake, Colusa, and Sutter. The city of Woodland is its county seat, though Davis is its largest city. As of the 2000 census, Yolo County had a population of 168,660. Excluding the conurbation of the University of California, Davis and the surrounding City of Davis, and the neighboring City of Sacramento, Yolo County remains a relatively rural agricultural region. This is evidenced by the multi-billion dollar California tomato industry, centering around Yolo County.