Alameda CA Zip Code Guide: Complete List and Map (2025)

Alameda, California comprises multiple distinct zip codes that serve different neighborhoods across the city's two islands and adjacent mainland areas. The primary zip codes are 94501 for the main island, 94502 for Bay Farm Island, and 94551 for the Harbor Bay Isle area. Understanding these zip codes is essential for mail delivery, property searches, and understanding neighborhood characteristics, as each code serves areas with different property types and community vibes.

Alameda's primary zip code is 94501, which covers the majority of the main island. This area includes the historic downtown district, the West End, and the Gold Coast neighborhood. Properties in this zip code range from Victorian homes to modern condominiums. The 94501 area is known for its walkable streets, proximity to the Alameda Ferry Terminal, and access to popular parks like Washington Park. This zip code also serves the Alameda Landing development, a mixed-use community with retail and residential units.

The 94502 zip code primarily serves Bay Farm Island, a residential community connected to the main island by bridges. This area features single-family homes, townhouses, and condominiums with water access and views of the Oakland estuary. Bay Farm Island is particularly family-friendly, with numerous parks, trails, and the Harbor Bay Club. The 94502 area also includes the Alameda Golf Complex and is conveniently located near Oakland International Airport, making it popular for professionals who travel frequently.

A third zip code, 94551, is assigned to the Harbor Bay Isle community, which is part of Bay Farm Island but has its own distinct identity. This master-planned community was developed by Harbor Bay Isles Associates and features waterfront properties, parks, and the Harbor Bay Business Park. The 94551 zip code area includes the Harbor Bay Village Shopping Center and is home to several corporate offices. This area is known for its well-maintained common areas and community amenities.

Using the correct zip code (a system of postal codes used by the United States Postal Service) is crucial for accurate mail delivery and property identification. When searching for real estate in Alameda, filtering by zip code can help narrow down options to specific neighborhoods that match your lifestyle preferences. Each zip code correlates with different school districts, property tax rates, and community facilities, making this geographic identifier an important factor in home buying decisions.

For home buyers and renters, understanding Alameda's zip code map helps target property searches effectively. Based on our experience assessment, properties in the 94501 zip code tend to include more historic architecture but may have smaller lots, while 94502 and 94551 areas typically offer more modern construction with community amenities. Rental prices and property values can vary significantly between these postal zones, so verifying the correct zip code ensures you're evaluating comparable properties within your preferred neighborhood.

When relocating to Alameda, confirm the specific zip code for your target property to ensure accurate information for services and utilities. Contact the local post office or use the USPS zip code lookup tool for verification. Always double-check the complete zip code when conducting property searches or sending important documents to avoid delivery delays or misdirected mail, which could impact real estate transactions.