78140 ZIP Code — Nixon, TX

Gonzales County, Texas

ZIP code 78140 is located in Nixon, Texas, within Gonzales County. It covers approximately 175.04 square miles and serves a population of 3,889 residents. This is a standard ZIP code in the Central (CT) timezone, served by area code 830.

About ZIP code 78140

The housing stock consists of a higher-than-average concentration of mobile homes. Most homes were built in the 1980s, giving the area an established character. Median home value is $90,100. Owner-occupancy sits near the national average at 67%.

Median household income is $66,940. The poverty rate of 7% is below the national average.

The dominant occupation class is production, transportation, and material moving, with manufacturing as the leading industry. The average commute of 24 minutes is near the national average.

College attainment at 4% is below the national average, consistent with a trades and production-oriented local economy.

Health indicators show elevated rates of smoking (21%) compared to national benchmarks. 24% of residents lack health insurance, above the national average.

Notable community characteristics include Spanish spoken in 24% of households.

3,889

population

175.04

sq mi land

Standard

ZIP type

Central (CT)

timezone

78140 ZIP code map

Cities in ZIP code 78140

Below are the cities the US Postal Service accepts for ZIP code 78140. Using any city not on this list may result in mail delivery delays.

City	Status
Nixon	Preferred

Nearby ZIP codes

78122 Leesville (2.5 mi) 78614 Cost (10.2 mi) 78159 Smiley (13.2 mi) 78160 Stockdale (14.3 mi) 78629 Gonzales (17.3 mi) 78155 Seguin (18.1 mi) 78638 Kingsbury (19.5 mi)

Demographics updated 06/2026

Population
Total population	3,889
Population density	22 / sq mi
State FIPS	48
County FIPS	177

Geography
Land area	175.04 sq mi
Water area	0.74 sq mi
Latitude	29.3761
Longitude	-97.7359
Timezone	Central (CT)
Area code	830

Total population by age

Gender

Race & ethnicity

Economics updated 06/2026

Household income

Income range	This ZIP	County avg	State avg
Under $50k	47.9%	43.0%	39.5%
$50k – $100k	32.6%	33.7%	30.1%
$100k – $200k	18.4%	18.6%	22.6%
Over $200k	1.1%	4.7%	7.8%

Demographics & statistics

3,889

Population

People per sq mi

27.6

Median age

$66,940

Median household income

$24,464

Per capita income

$90,100

Median home value

$875

Median monthly rent

67.3%

Home ownership

7.3%

Poverty rate

2.4%

Unemployment

1,053

Housing units

4.2%

Bachelor's or higher

Age distribution

Male Female

270

Under 5

286

140

5–9

148

161

10–14

170

130

15–19

138

149

20–24

159

325

25–34

345

203

35–44

215

148

45–54

157

119

55–59

127

60–64

65–74

75–84

85+

← Male

Female →

Age summary

Group	Count	%
Under 18	1,342	34.5%
18 and over	2,547	65.5%
65 and over	340	8.7%
Median age	27.6 years

Race & ethnicity

White 62.6%

Hispanic or Latino 17.4%

Two or more races 11.2%

Other race 8.3%

Black or African American 0.4%

Group	Count	%
White	2,950	62.6%
Hispanic or Latino	820	17.4%
Two or more races	526	11.2%
Other race	392	8.3%
Black or African American	21	0.4%

Household income

Income range	This ZIP	County avg	State avg
Under $50k	47.9%	43.0%	39.5%
$50k – $100k	32.6%	33.7%	30.1%
$100k – $200k	18.4%	18.6%	22.6%
Over $200k	1.1%	4.7%	7.8%

Under $10k 2.8%

$10k–$15k 5.5%

$15k–$25k 4.3%

$25k–$35k 6.6%

$35k–$50k 18.8%

$50k–$75k 24.4%

$75k–$100k 14.8%

$100k–$150k 14.5%

$150k–$200k 7.6%

$200k+ 0.8%

Range	% of households
Under $10k	2.8%
$10k–$15k	5.5%
$15k–$25k	4.3%
$25k–$35k	6.6%
$35k–$50k	18.8%
$50k–$75k	24.4%
$75k–$100k	14.8%
$100k–$150k	14.5%
$150k–$200k	7.6%
$200k+	0.8%
Median income	$66,940

Housing

Home values

Under $50k 25.3%

$50k–$100k 34.0%

$100k–$150k 9.5%

$150k–$200k 4.5%

$200k–$300k 18.0%

$300k–$500k 3.8%

$500k–$1M 4.9%

Housing overview

Metric	Value
Median home value	$90,100
Median rent / month	$875
Owner occupied	67.3%
Renter occupied	32.7%
Vacant	13.0%
Single-family detached	64.8%
Large apartment buildings	0.0%
Mobile homes	29.2%
Median rooms	5.0
Avg household size (owned)	3.16

Year built

Era	%
2020 or later	0.9%
2010–2019	8.0%
2000–2009	3.3%
1990–1999	15.2%
1980–1989	24.5%
1970–1979	16.1%
1960–1969	8.6%
1950–1959	16.1%
1940–1949	1.6%
1939 or earlier	5.8%

Bedrooms

Size	% of units
No bedroom (studio)	0.2%
1 bedroom	13.4%
2 bedrooms	21.5%
3 bedrooms	51.7%
4 bedrooms	12.4%
5+ bedrooms	0.7%

Vehicles per household

Vehicles	% of households
No vehicle	7.3%
1 vehicle	34.1%
2 vehicles	34.8%
3 or more	23.7%

Heating fuel

Fuel type	%
Utility gas	14.9%
Electricity	83.1%
Propane / LP gas	2.0%

Households & families

Household type	Count	%
Married-couple family	580	45.3%
Cohabiting couple	135	10.5%
Male householder, no spouse	161	12.6%
Female householder, no spouse	404	31.6%
Households with children under 18	543	42.4%
Households with seniors (65+)	356	27.8%
Average household size	3.03

Marital status

Status	Male	Female
Never married	32.2%	34.3%
Married	58.4%	41.5%
Separated	0.3%	2.1%
Widowed	3.1%	5.6%
Divorced	6.0%	16.5%

Education

Less than 9th grade 11.5%

Some HS, no diploma 16.6%

HS graduate 44.7%

Some college, no degree 15.7%

Associate's degree 7.2%

Bachelor's degree 3.6%

Graduate / professional 0.6%

Metric	%
HS diploma or higher	71.9%
Bachelor's or higher	4.2%

School enrollment (ages 3–17)

Type	Count	%
Nursery / preschool	96	9.4%
Kindergarten	83	8.1%
Elementary school	521	50.9%
High school	211	20.6%
College / grad school	113	11.0%

Employment

Industry of employment

Manufacturing 37.5%

Agriculture & mining 16.5%

Education & healthcare 6.8%

Construction 5.8%

Retail trade 5.8%

Finance & real estate 5.8%

Other services 5.8%

Wholesale trade 5.4%

Arts, food & hospitality 4.5%

Transportation & utilities 2.7%

Professional & management 2.3%

Public administration 1.0%

Occupation

Category	%
Management, business & arts	12.8%
Service	8.3%
Sales & office	13.7%
Natural resources & construction	22.8%
Production & transportation	42.4%

Employment type

Type	%
Private sector	88.2%
Government	4.7%
Self-employed	7.2%
Unpaid family workers	0.0%

Commute

Method	%
Drive alone	83.1%
Carpool	4.1%
Public transit	0.0%
Walk	3.5%
Work from home	5.5%
Other means	3.7%
Avg commute (minutes)	23.9

Poverty

All people 7.3%

Under 18 years 4.2%

18 and over 8.9%

Married-couple families 1.2%

Female-led households 18.7%

Income support

Source	% of households
Social Security	25.9%
Retirement income	14.7%
Supplemental Security	2.0%
Cash public assistance	0.0%
Food stamps / SNAP	13.8%

Health indicators

Condition	%
Obesity	41.0%
High blood pressure	35.3%
High cholesterol	35.6%
Diabetes	14.3%
Heart disease	7.1%
Stroke	3.4%
Asthma	9.2%
Arthritis	22.8%
Kidney disease	3.4%
Pulmonary disease	7.5%
Cancer	5.4%

Behavior / access	%
Smoking	20.7%
Binge drinking	17.5%
No physical activity	34.2%
Less than 7 hrs sleep	34.9%
Depression	21.7%
Fair or poor health	23.8%
Poor mental health	16.4%
Poor physical health	13.8%
No health insurance	41.1%
Visited doctor (checkup)	69.5%
Visited dentist	44.1%
Cholesterol screening	86.0%
Teeth loss	19.7%

Veterans & disability

Veterans	Count	%
Civilian veterans	52	2.0%

Disability	%
Any disability	12.8%
Under 18	15.7%
18–64 years	7.7%
65 and over	35.0%

Health insurance coverage

Type	%
Private insurance	52.0%
Public insurance	28.7%
No insurance	23.5%
Uninsured under 19	12.5%

Language & origin

Language spoken at home (age 5+)

Language	Count	%
English only	3,333	85.7%
Spanish	807	24.2%
Other Indo-European	807	24.2%
Asian & Pacific Islander	0	0.0%
Other languages	0	0.0%

Place of birth & citizenship

Origin	Count	%
Native born (US)	3,081	79.2%
Born in same state	3,063	78.8%
Born in different state	2,750	70.7%
Foreign born	18	0.5%
Naturalized citizen	808	20.8%
Not a US citizen	181	22.4%

Ancestry

Ancestry	Count	%
Italian	185	4.8%
Arab	130	3.3%

Ancestry	Count	%
French	87	2.2%
English	18	0.5%

Technology access

Metric	% of households
Computer access	32.9%
Internet access	90.5%

Source: U.S. Census Bureau, American Community Survey 2025 estimates.

Frequently asked questions about ZIP code 78140

What city is ZIP code 78140 in?

ZIP code 78140 is primarily assigned to Nixon, Texas.

What county is ZIP code 78140 in?

ZIP code 78140 falls within Gonzales County, Texas.

Is ZIP code 78140 family-oriented?

35% of residents in ZIP code 78140 are under 18, reflecting a younger, family-oriented community.

How educated is the population of ZIP code 78140?

4% of residents hold a bachelor's degree or higher — below the national average of ~33%, consistent with a trades-oriented local economy.

Is Spanish widely spoken in ZIP code 78140?

Approximately 24% of households in ZIP code 78140 speak Spanish as a primary language.

What is the typical home value in ZIP code 78140?

The median home value in ZIP code 78140 is $90,100.

What timezone is ZIP code 78140 in?

ZIP code 78140 observes the CST timezone.