Contra Costa County – 94595 – Walnut Creek – CA – 13/35
Contra Costa County – 94595 – Walnut Creek – CA – 13/35
Cities: Walnut Creek, CA (66.03%), Lafayette, CA (2.84%)
County: Contra Costa County, CA
Estimated zip code population in 2011: 16,170
Zip code population in 2010: 16,425
Zip code population in 2000: 18,019