Byron, California Zip Codes
📍 Byron is in Contra Costa County, California with 1 zip code; the most populous is 94514.
Byron is a USPS city name in Contra Costa County, California with a Census population of approximately 2,023 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 Byron 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 Byron Zip Codes
Byron at a Glance
Byron has 1 ZIP code in this directory: 1 standard delivery ZIP. The 1 ZIP with published Census housing data cover 2,023 residents, the largest being 94514 with 2,023 people.
The median ZIP in Byron has a household income of $72,445 and a home value of $764,800, a price-to-income ratio of 10.6, far above the 6.7 California ZIP median. Median rent across these ZIPs is $2,336 a month.
66% of households in the typical Byron ZIP own their home (statewide ZIP median 64%). 19% of adults hold a bachelor's degree, below the 31% statewide median. The median poverty rate is 10.8%, in line with the 10.8% statewide ZIP median. Overall density is about 67 residents per square mile across 30 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.
Byron Zip Code Map
Interactive map of Byron, California zip codes. Click any marker for details.