Potrero, CA

ZIP code 91990 is a PO Box-only postal code associated with Chula Vista, California, rather than a defined residential neighborhood with conventional street boundaries. Consequently, major landmarks cannot reliably be identified as lying within the ZIP itself. Notable sites in the broader city include the Chula Vista Bayfront, the Living Coast Discovery Center, and Third Avenue Village, but these are Chula Vista landmarks, not confirmed features of ZIP code 91990.