Alamo, California Zip Codes
📍 Alamo is in Contra Costa County, California with 1 zip code; the most populous is 94507.
Alamo is a USPS city name in Contra Costa County, California with a Census population of approximately 14,503 across its ZIP codes. Contra Costa County as a whole has 53 ZIP codes in this directory. Below you'll find every zip code serving Alamo with population, income and home value, a map, and the city's affordability profile.
Population and demographic data sourced from the U.S. Census Bureau American Community Survey (ACS) 5-Year Estimates. ZIP code routing data sourced from the United States Postal Service (USPS).
All Alamo Zip Codes
Alamo at a Glance
Alamo has 1 ZIP code in this directory: 1 standard delivery ZIP. The 1 ZIP with published Census housing data cover 14,503 residents, the largest being 94507 with 14,503 people.
The median ZIP in Alamo has a household income of $250,001 and a home value of more than $2,000,000, a price-to-income ratio of at least 8.0, above the 6.7 California ZIP median. Median rent across these ZIPs is $3,501 a month.
92% of households in the typical Alamo ZIP own their home (statewide ZIP median 64%). 76% of adults hold a bachelor's degree, far above the 31% statewide median. The median poverty rate is 3.6%, far below the 10.8% statewide ZIP median. Overall density is about 1,295 residents per square mile across 11 square miles of ZIP land area.
Medians are taken across the ZIP codes listed below (each ZIP weighted equally); PO Box and no-data ZIPs are excluded. Definitions on the methodology page; statewide comparisons in the 2026 California ZIP Code Affordability Report.
Alamo Zip Code Map
Interactive map of Alamo, California zip codes. Click any marker for details.