El Sobrante, CA

ZIP code 94820 is located in the city of Crockett, California. This area is home to the C&H Sugar Refinery, a historic landmark that has been producing sugar since 1906. Other prominent landmarks in the area include the scenic Carquinez Bridge, which spans the Carquinez Strait and connects Crockett to the city of Vallejo. Additionally, the area offers beautiful views of the surrounding hills and waterways.