Contra Costa County – 94561 – Oakley – CA – 25/35
Contra Costa County – 94561 – Oakley – CA – 25/35
Cities: Oakley, CA (87.75%), Knightsen, CA (3.82%), Antioch, CA (0.15%)
County: Contra Costa County, CA
Estimated zip code population in 2011: 35,383
Zip code population in 2010: 36,515
Zip code population in 2000: 27,599