ZIP Code Tabulation Area · Texas

ZIP Code 78140: Gonzales County, TX

ZIP Code 78140 (Gonzales County, Texas) has an estimated 3,474 residents in 1,278 households. The median household income is $50,250, the median home value is $85,200 and the median gross rent is $845/mo. Figures are U.S. Census Bureau American Community Survey 2020–2024 5-year estimates for the matching ZIP Code Tabulation Area.

American Community Survey 2020–2024 5-year estimates · Updated Oct 26, 2026

Some estimates have a large margin of error. One figure for this ZIP (owner-occupied) is marked with *. ACS figures come from a sample, and small areas have fewer responses, so treat these numbers as rough ranges.

Total population

3,474

Margin of error ±627

Median household income

$50,250

Margin of error ±$11,928

Median home value

$85,200

Margin of error ±$17,686

Median gross rent

$845/mo

Margin of error ±$415

Median age

36.2 yrs

Margin of error ±5.0 yrs

Mean travel time to work

26.4 min

Margin of error ±8.7 min

How ZIP 78140 compares with Texas and the U.S.

State and national figures are the Census Bureau's own estimates for those areas from the same ACS release, not averages of ZIP codes.

Median age

ZIP 7814036.2 yrsTexas35.6 yrsUnited States38.9 yrs

Median household income

ZIP 78140$50,250Texas$78,476United States$80,734

Per capita income

ZIP 78140$27,798Texas$40,752United States$44,673

Poverty rate

ZIP 7814012.0%Texas13.8%United States12.5%

Unemployment rate

ZIP 781404.5%Texas5.3%United States5.2%

Bachelor's degree or higher

ZIP 781406.2%Texas33.8%United States35.7%

Median home value

ZIP 78140$85,200Texas$283,800United States$332,700

Median gross rent

ZIP 78140$845/moTexas$1,403/moUnited States$1,413/mo

Owner-occupied homes

ZIP 7814073.5%*Texas62.6%United States65.2%

Mean travel time to work

ZIP 7814026.4 minTexas26.7 minUnited States26.4 min

Worked from home

ZIP 781405.5%Texas14.4%United States15.1%

All figures for ZIP 78140

Each estimate has a 90% margin of error: the true value is likely within that range. * marks estimates with a large margin of error (a coefficient of variation above 30%, or ±10 percentage points or more for rates).

ZIP 78140 — ACS 2020–2024 5-year estimates
Measure	ZIP 78140	Margin of error	Texas	United States
Total population	3,474	±627	30,188,424	334,922,499
Median age	36.2 yrs	±5.0 yrs	35.6 yrs	38.9 yrs
Households	1,278	±200	10,992,816	129,227,496
Median household income	$50,250	±$11,928	$78,476	$80,734
Per capita income	$27,798	±$4,982	$40,752	$44,673
Poverty rate	12.0%	±3.7 pts	13.8%	12.5%
Unemployment rate	4.5%	±3.4 pts	5.3%	5.2%
Bachelor's degree or higher	6.2%	±3.4 pts	33.8%	35.7%
Median home value	$85,200	±$17,686	$283,800	$332,700
Median gross rent	$845/mo	±$415	$1,403/mo	$1,413/mo
Owner-occupied homes	73.5%*	±11.1 pts	62.6%	65.2%
Mean travel time to work	26.4 min	±8.7 min	26.7 min	26.4 min
Worked from home	5.5%	±8.1 pts	14.4%	15.1%

Race and Hispanic or Latino origin

Shares of the total population by the Census Bureau's race and Hispanic or Latino origin categories (table B03002), listed in the Census Bureau's order. People self-identify on the survey.

Population by race and Hispanic or Latino origin, ZIP 78140
Group	ZIP 78140	Texas	United States
White alone, not Hispanic or Latino	32.7%	39.1%	57.4%
Black or African American alone, not Hispanic or Latino	1.9%	11.9%	11.9%
American Indian and Alaska Native alone, not Hispanic or Latino	0.0%	0.1%	0.5%
Asian alone, not Hispanic or Latino	0.0%	5.5%	5.9%
Native Hawaiian and Other Pacific Islander alone, not Hispanic or Latino	0.0%	0.1%	0.2%
Some other race alone, not Hispanic or Latino	1.2%	0.4%	0.6%
Two or more races, not Hispanic or Latino	1.6%	3.1%	4.3%
Hispanic or Latino (of any race)	62.6%	39.7%	19.3%

Where ZIP 78140 is

State: Texas
Main county: Gonzales County— also overlaps Wilson County, Guadalupe County, Karnes County
Largest overlapping place: Nixon (1% of the ZIP's land area)
Land area: 175.04 sq mi· about 20 people per sq mi

County and place names come from the Census Bureau's 2020 ZCTA relationship files. A ZIP code's mailing city, set by the U.S. Postal Service, can differ from these names.

Other ZIP codes in Gonzales County

78122 Gonzales County, TX 78159 Gonzales County, TX 78614 Gonzales County, TX 78629 Gonzales County, TX 78632 Gonzales County, TX 78658 Gonzales County, TX 78677 Gonzales County, TX 78959 Gonzales County, TX

See every ZIP code in Texas, or compare ZIP 78140 with another ZIP code.

Census figures describe residents as a group and cannot tell you about any one home or street. For a specific address, check local government and housing records.

About ZIP codes and ZCTAs: the Census Bureau publishes statistics for ZIP Code Tabulation Areas, which approximate USPS ZIP code delivery areas. Learn how they differ.

Sources

U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates, detailed tables B01003, B01002, B11001, B19013, B19301, B17001, B23025, B15003, B25077, B25064, B25003, B08013, B08303, B08301, B03002 — snapshot Oct 26, 2026.
U.S. Census Bureau, 2020 ZCTA5 relationship files (county and place).
Data: U.S. Census Bureau, American Community Survey 5-year estimates (detailed tables) and 2020 Census ZCTA relationship files. This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau. These agencies do not endorse OpenZIP.