California's 6th congressional district  California's 6th congressional district is a congressional district in the U.S. state of California. Doris Matsui, a Democrat, has represented the district since January 2013. Currently, the 6th district encompasses the city of Sacramento and some of its suburbs. It consists of parts of Sacramento and Yolo counties. Prior to redistricting by the California Citizens Redistricting Commission of 2011, the 6th district encompassed the coastal areas north of San Francisco. It consisted of Marin County and most of Sonoma County. Cities in the district included Santa Rosa, Rohnert Park, Petaluma, Novato, San Rafael, and Mill Valley.