| ZIP Codes: | 10 ZIP Codes (8 Standard, 2 PO Box, 0 Unique) [See All] |
| Area Code: | 830 |
| Timezone: | Central (GMT -06:00) |
| Local Time: | 11:55:15 PM |
| Population: | 19,977 [See All] |
| FIPS: | 48177 |
| Land Area: | 1,043 sq mi |
| Water Area: | 4 sq mi |
| Coordinates: | 29.4672, -97.5610 |
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19,977 residents live across 10 ZIPs covering 1,043 sq mi, served by 10 distinct USPS-recognized cities.
Population moved from 20,191 to 19,883 from 2014 to 2024 — a -1.5% change. 4 ZIPs gained residents, 4 lost.
The county's wealthiest ZIP 78632 (Harwood, $62,500 median) and poorest ZIP 78159 (Smiley, $35,083) are 32.1 miles apart — a 1.8× income gap across local geography.
Median home values vary 2.4× across this county — from $85,200 in 78140 (Nixon) to $206,700 in 78629 (Gonzales).
Density varies 6× across the county — from 5 people/sq mi in 78159 (Smiley) to 30 in 78629 (Gonzales).
Educational attainment ranges from 6.2% bachelor's+ in 78140 (Nixon) to 26.0% in 78614 (Cost) — the breadth of educational profiles across the area.
Within Texas, this is the #119 most populous of 254 counties and ranks #219 for median household income .
Weighted by population, the typical household earns about $57,306 across the county — reflecting what a typical resident sees, not a simple ZIP average.
11.5% of adults age 25+ hold a bachelor's degree or higher (1,507 of 13,155 reporting).
8 Standard delivery, 2 PO Box only, 0 single-entity Unique ZIPs serve this county.
A frontier county — vast land area with only a few residents per square mile. Daily life looks very different here than in the country's denser counties.
One ZIP holds the majority of this county's population — a sign of a county built around a single city or town.
| ZIP | City | Type | Population | Median Income | Area (sq mi) | 10-yr Growth |
|---|---|---|---|---|---|---|
| 78629 | Gonzales | Standard | 12,740 | $59,521 | 431.0 | 5.4% |
| 78140 | Nixon | Standard | 3,474 | $50,250 | 156.7 | 9.0% |
| 78632 | Harwood | Standard | 1,245 | $62,500 | 78.7 | 33.9% |
| 78959 | Waelder | Standard | 1,157 | $60,472 | 150.6 | -46.4% |
| 78159 | Smiley | Standard | 623 | $35,083 | 129.6 | -29.8% |
| 78122 | Leesville | Standard | 338 | — | 39.1 | 2.7% |
| 78614 | Cost | Standard | 262 | — | 49.4 | -46.6% |
| 78658 | Ottine | PO Box | 94 | — | 0.0 | — |
| 78677 | Wrightsboro | Standard | 44 | — | 7.8 | -62.1% |
| 78604 | Belmont | PO Box | — | — | 0.0 | — |