Contra Costa County – 94513 – Brentwood – CA – 18/35

Cities: Brentwood, CA (19.08%), Knightsen, CA (6.40%), Byron, CA (1.47%), Antioch, CA (0.41%), Discovery Bay, CA (0.26%)
County: Contra Costa County, CA

Estimated zip code population in 2011: 51,493
Zip code population in 2010: 54,605
Zip code population in 2000: 26,560