Napa is the county seat of Napa County, California. The 94559 zip code is located in the Napa community of California in Napa county. You can learn more about Real Estate in Napa CA 94559 below, including current Homes For Sale: Condos, Townhomes, Foreclosures and Bank Owned Properties, Short Sales and more. Our Local Napa CA Realtors can assist you with selling your home in California or buying your next piece of Real Estate in or around the Napa CA 94559 community. Be sure to check out our FREE Instant Home Value wizard to get a quick report on your homes current estimated value.