Home > TX > Guadalupe County > Seguin > Zip 78155

Zip Code 78155 — Seguin, TX

ZIP Code 78155 is associated with Seguin, TX, in Guadalupe County. The listed population estimate is 55,600; estimated density is 60.4 people per square mile. Among records with population estimates, it ranks #2 of 7 in Guadalupe County and #103 of 1,924 in TX.
Page generated: 2026-10-08. This is not the source data release date.

📍 View location on OpenStreetMap (29.533050, -97.938320)

Data MetricLocal Statistic
Postal / Zip Code78155
Primary CitySeguin
State / ProvinceTX
CountyGuadalupe
Total Population55,600
Population Density60.4 people/sq mi
TimezoneAmerica/Chicago

How 78155 Compares

MetricZIP 78155Guadalupe County recordsTX records
Population estimate55,600219,942 (sum)30,188,035 (sum)
Population Density60.4 /sq mi----
County population rank#2 of 7----
State population rank#103 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 78123McQueeney7.8 mi2,127
ZIP 78638Kingsbury12.2 mi2,135
ZIP 78124Marion12.9 mi6,157
ZIP 78130New Braunfels13.5 mi104,009
ZIP 78122Leesville14.4 mi338

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 →