| ZIP Codes: | 9 ZIP Codes (6 Standard, 3 PO Box, 0 Unique) [See All] |
| Area Codes: | 512 / 737 / 830 |
| Timezone: | Central (GMT -06:00) |
| Local Time: | 11:55:15 PM |
| Population: | 157,840 [See All] |
| FIPS: | 48187 |
| CBSA: | San Antonio-New Braunfels, TX |
| Land Area: | 599 sq mi |
| Water Area: | 3 sq mi |
| Coordinates: | 29.6107, -98.0189 |
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157,840 residents live across 9 ZIPs covering 599 sq mi, served by 8 distinct USPS-recognized cities.
Population moved from 123,859 to 157,840 from 2014 to 2024 — a +27.4% change. 4 ZIPs gained residents, 3 lost.
The county's wealthiest ZIP 78108 (Cibolo, $113,004 median) and poorest ZIP 78638 (Kingsbury, $69,250) are 27.7 miles apart — a 1.6× income gap across local geography.
Median home values vary 1.4× across this county — from $238,500 in 78123 (Mc Queeney) to $337,600 in 78108 (Cibolo).
Density varies 100× across the county — from 18 people/sq mi in 78638 (Kingsbury) to 1,834 in 78108 (Cibolo).
Educational attainment ranges from 21.7% bachelor's+ in 78155 (Seguin) to 42.2% in 78108 (Cibolo) — the breadth of educational profiles across the area.
Within Texas, this is the #31 most populous of 254 counties and ranks #31 for median household income with the #19 fastest decade growth .
On the national stage, Guadalupe County is and #76 for decade growth .
Weighted by population, the typical household earns about $92,579 across the county — reflecting what a typical resident sees, not a simple ZIP average.
32.6% of adults age 25+ hold a bachelor's degree or higher (34,673 of 106,378 reporting).
6 Standard delivery, 3 PO Box only, 0 single-entity Unique ZIPs serve this county.
| ZIP | City | Type | Population | Median Income | Area (sq mi) | 10-yr Growth |
|---|---|---|---|---|---|---|
| 78155 | Seguin | Standard | 55,600 | $71,039 | 360.7 | 17.8% |
| 78108 | Cibolo | Standard | 49,784 | $113,004 | 27.1 | 52.8% |
| 78154 | Schertz | Standard | 41,907 | $100,572 | 34.1 | 26.0% |
| 78124 | Marion | Standard | 6,157 | $74,192 | 56.0 | 14.7% |
| 78638 | Kingsbury | Standard | 2,135 | $69,250 | 116.7 | -15.9% |
| 78123 | Mc Queeney | Standard | 2,127 | $97,553 | 4.1 | -16.6% |
| 78670 | Staples | PO Box | 130 | $78,625 | 0.0 | -64.8% |
| 78115 | Geronimo | PO Box | — | — | 0.0 | — |
| 78156 | Seguin | PO Box | — | — | 0.0 | — |