San Ysidro, California Zip Codes
📍 San Ysidro is in San Diego County, California with 2 zip codes; the most populous is 92173.
San Ysidro is a USPS city name in San Diego County, California with a Census population of approximately 28,609 across its ZIP codes. San Diego County as a whole has 191 ZIP codes in this directory. Below you'll find every zip code serving San Ysidro 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 San Ysidro Zip Codes
San Ysidro at a Glance
San Ysidro has 2 ZIP codes in this directory: 1 standard delivery ZIP and 1 PO Box or unique ZIP that carries no resident population in Census data. The 1 ZIP with published Census housing data cover 28,609 residents, the largest being 92173 with 28,609 people.
The median ZIP in San Ysidro has a household income of $58,209 and a home value of $464,500, a price-to-income ratio of 8.0, above the 6.7 California ZIP median. Median rent across these ZIPs is $1,449 a month.
29% of households in the typical San Ysidro ZIP own their home (statewide ZIP median 64%). 11% of adults hold a bachelor's degree, far below the 31% statewide median. The median poverty rate is 16.3%, far above the 10.8% statewide ZIP median. Overall density is about 9,865 residents per square mile across 3 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.
San Ysidro Zip Code Map
Interactive map of San Ysidro, California zip codes. Click any marker for details.