Casmalia, California Zip Codes
📍 Casmalia is in Santa Barbara County, California with 1 zip code; the most populous is 93429.
Casmalia is a USPS city name in Santa Barbara County, California with a Census population of approximately 64 across its ZIP codes. Santa Barbara County as a whole has 41 ZIP codes in this directory. Below you'll find every zip code serving Casmalia 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 Casmalia Zip Codes
Casmalia at a Glance
Casmalia has 1 ZIP code in this directory: 1 standard delivery ZIP.
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.
Casmalia Zip Code Map
Interactive map of Casmalia, California zip codes. Click any marker for details.