The Sacramento Area Council of Governments (SACOG) is a voluntary association of governments.  Member jurisdictions include:  the County of Sacramento (including the cities of Citrus Heights, Elk Grove, Folsom, Galt, Isleton, Rancho Cordova and Sacramento); the County of Yolo (including the cities of Davis, West Sacramento, Winters, and Woodland); the County of Sutter (including the cities of Live Oak and Yuba City); the County of Yuba (including the cities of Marysville and Wheatland); Placer County (including the cities of Auburn, Colfax, Lincoln, Rocklin, Roseville and Town of Loomis) and El Dorado County (including the City of Placerville).

SACOG is the federally designated Metropolitan Planning Organization (MPO) for the Sacramento, Davis and Marysville/Yuba City urbanized areas. SACOG is also the State designated Regional Transportation Planning Agency (RTPA) for the counties of Sacramento, Yolo, Sutter and Yuba.