california state congressional districts by zip code California State Congressional Districts By Zip Code Free Download 1101 College Avenue , Suite 200 , Santa Rosa , CA 95404 District Director . ... ZIP Codes : 94901 , 94903–04 , 94912–15 , 94920 , 94922–31 , 94933 ... as legislative aide to Senate majority leader , California State Legislature ; past chairman ... california state congressional..