Contra Costa County – 94598 – Walnut Creek – CA – 15/35
Contra Costa County – 94598 – Walnut Creek – CA – 15/35
Cities: Walnut Creek, CA (52.53%), Waldon, CA (0.66%), Concord, CA (0.20%)
County: Contra Costa County, CA
Estimated zip code population in 2011: 26,180
Zip code population in 2010: 25,818
Zip code population in 2000: 26,011