Zip Code 78203 — San Antonio, TX

ZIP Code 78203 is associated with San Antonio, TX, in Bexar County. The listed population estimate is 5,200; estimated density is 1,469.1 people per square mile. Among records with population estimates, it ranks #62 of 69 in Bexar County and #1008 of 1,924 in TX.
Page generated: 2026-10-08. This is not the source data release date.

📍 View location on OpenStreetMap (29.415130, -98.459300)

Data MetricLocal Statistic
Postal / Zip Code78203
Primary CitySan Antonio
State / ProvinceTX
CountyBexar
Total Population5,200
Population Density1,469.1 people/sq mi
TimezoneAmerica/Chicago

How 78203 Compares

MetricZIP 78203Bexar County recordsTX records
Population estimate5,2002,079,418 (sum)30,188,035 (sum)
Population Density1,469.1 /sq mi----
County population rank#62 of 69----
State population rank#1008 of 1,924----

Regional sums combine the population estimates in the listed ZIP records; they are not official county or state population totals.

Explore More ZIP Codes

Nearby ZIP Codes in TX

ZIP CodeCityDistancePopulation estimate
ZIP 78202San Antonio0.9 mi10,224
ZIP 78210San Antonio1.4 mi34,940
ZIP 78208San Antonio1.7 mi3,861
ZIP 78205San Antonio1.7 mi1,538
ZIP 78215San Antonio2.2 mi3,506

Data Sources & Methodology: Geographic coordinates and ZIP Code assignments are derived from underlying geographic and postal datasets. Note that ZIP Codes are USPS postal delivery areas, while Census ZCTAs are statistical approximation areas. Read full methodology →