Contra Costa County – 94517 – Clayton – CA – 20/35
Contra Costa County – 94517 – Clayton – CA – 20/35
Cities: Clayton, CA (6.69%), Concord, CA (0.06%)
County: Contra Costa County, CA
Estimated zip code population in 2011: 12,542
Zip code population in 2010: 12,385
Zip code population in 2000: 14,223