Martindale ZIP Code List — Caldwell County, TX

There is one unique ZIP code in Martindale, Texas and it is 78655. Area code: 512/737.

ZIP codes

28.68

sq mi land

0.23

sq mi water

512/737

area code

Martindale, TX ZIP code map

About Martindale, TX

Martindale, Texas is a quaint small town located within Caldwell County. Known for its friendly community, Martindale offers a peaceful retreat from the hustle and bustle of larger cities. The ZIP code for Martindale is 78655, and it boasts a unique charm with a rustic, rural feel.

Location & geography

Martindale is situated in the central part of Texas, approximately 17 miles southeast of Austin and about 10 miles from San Marcos. The area covers a total of 28.68 square miles of land and includes a small water area of 0.23 square miles. The terrain is characterized by rolling hills and the scenic beauty typical of the Texas Hill Country.

Community & economy

The community in Martindale is known for its close-knit atmosphere, where residents often participate in local events and festivities. Key industries in the area include agriculture and small businesses, which contribute to the local economy. Daily life in Martindale is relaxed, with a strong focus on family, outdoor activities, and local heritage.

Transportation

Martindale is easily accessible via Interstate 35, which runs nearby and connects residents to larger urban areas. The nearest airport is Austin-Bergstrom International Airport, located approximately 20 miles away. Public transport options are limited, making personal vehicles the primary mode of transportation for residents.

History

Martindale was founded in the 19th century and has a rich history associated with the growth of the Texas railroad system. Initially established as a small agricultural community, it developed key industries that have shaped its identity over the years. Notable events include local festivals that celebrate its heritage and the establishment of community organizations that promote local culture.

Did you know?

One surprising fact about Martindale is that it features a variety of historic buildings and homes that reflect its long-standing history. The town is also known for hosting an annual cowboy poetry gathering, attracting visitors interested in Western heritage and culture.

ZIP codes for Martindale, TX (1)

ZIP code	City	County	Map
78655	Martindale	Caldwell	View map

Demographics & statistics

3,671

Population

46.6

Median age

$53,750

Median household income

$30,324

Per capita income

$194,400

Median home value

$1,064

Median monthly rent

65.5%

Home ownership

12.7%

Poverty rate

9.5%

Unemployment

1,008

Housing units

20.4%

Bachelor's or higher

Age distribution

Male Female

166

Under 5

137

5–9

10–14

142

15–19

117

20–24

269

25–34

223

135

35–44

111

601

45–54

497

213

55–59

176

60–64

106

65–74

75–84

85+

← Male

Female →

Age summary

Group	Count	%
Under 18	739	20.1%
18 and over	2,932	79.9%
65 and over	322	8.8%
Median age	46.6 years

Race & ethnicity

White 42.8%

Two or more races 26.3%

Hispanic or Latino 26.1%

Black or African American 2.3%

Other race 1.7%

Asian 0.4%

Native Hawaiian / Pacific Islander 0.3%

American Indian / Alaska Native 0.1%

Group	Count	%
White	2,126	42.8%
Two or more races	1,309	26.3%
Hispanic or Latino	1,298	26.1%
Black or African American	112	2.3%
Other race	83	1.7%
Asian	20	0.4%
Native Hawaiian / Pacific Islander	16	0.3%
American Indian / Alaska Native	5	0.1%

Household income

Under $10k 1.3%

$10k–$15k 1.3%

$15k–$25k 1.6%

$25k–$35k 18.3%

$35k–$50k 24.9%

$50k–$75k 10.9%

$75k–$100k 15.3%

$100k–$150k 13.6%

$150k–$200k 7.1%

$200k+ 5.6%

Range	% of households
Under $10k	1.3%
$10k–$15k	1.3%
$15k–$25k	1.6%
$25k–$35k	18.3%
$35k–$50k	24.9%
$50k–$75k	10.9%
$75k–$100k	15.3%
$100k–$150k	13.6%
$150k–$200k	7.1%
$200k+	5.6%
Median income	$53,750

Housing

Home values

Under $50k 1.1%

$50k–$100k 35.4%

$100k–$150k 8.2%

$150k–$200k 5.8%

$200k–$300k 19.4%

$300k–$500k 17.7%

$500k–$1M 11.2%

$1M+ 1.2%

Housing overview

Metric	Value
Median home value	$194,400
Median rent / month	$1,064
Owner occupied	65.5%
Renter occupied	34.5%
Vacant	6.1%
Single-family detached	65.7%
Large apartment buildings	0.0%
Mobile homes	21.7%
Median rooms	5.5
Avg household size (owned)	2.82

Year built

Era	%
2020 or later	0.2%
2010–2019	17.4%
2000–2009	15.5%
1990–1999	19.7%
1980–1989	11.1%
1970–1979	11.9%
1960–1969	2.5%
1950–1959	1.3%
1940–1949	1.5%
1939 or earlier	18.8%

Bedrooms

Size	% of units
No bedroom (studio)	1.7%
1 bedroom	7.6%
2 bedrooms	32.4%
3 bedrooms	31.0%
4 bedrooms	24.9%
5+ bedrooms	2.5%

Vehicles per household

Vehicles	% of households
No vehicle	0.4%
1 vehicle	36.5%
2 vehicles	29.9%
3 or more	33.2%

Heating fuel

Fuel type	%
Electricity	79.2%
Propane / LP gas	20.1%
Fuel oil	0.7%

Households & families

Household type	Count	%
Married-couple family	696	49.7%
Cohabiting couple	257	18.3%
Male householder, no spouse	289	20.6%
Female householder, no spouse	159	11.3%
Households with children under 18	467	33.3%
Households with seniors (65+)	248	17.7%
Average household size	2.62

Marital status

Status	Male	Female
Never married	40.7%	32.0%
Married	44.5%	57.0%
Separated	0.6%	1.8%
Widowed	2.6%	2.3%
Divorced	11.5%	6.8%

Education

Less than 9th grade 7.8%

Some HS, no diploma 16.8%

HS graduate 22.8%

Some college, no degree 28.6%

Associate's degree 3.6%

Bachelor's degree 14.9%

Graduate / professional 5.5%

Metric	%
HS diploma or higher	75.4%
Bachelor's or higher	20.4%

School enrollment (ages 3–17)

Type	Count	%
Nursery / preschool	28	5.4%
Kindergarten	19	3.7%
Elementary school	231	44.5%
High school	188	36.2%
College / grad school	53	10.2%

Employment

Industry of employment

Education & healthcare 26.0%

Professional & management 19.8%

Construction 9.4%

Arts, food & hospitality 7.9%

Manufacturing 7.7%

Public administration 7.5%

Retail trade 7.4%

Transportation & utilities 5.0%

Wholesale trade 2.8%

Other services 2.2%

Finance & real estate 2.0%

Agriculture & mining 1.3%

Information 0.9%

Occupation

Category	%
Management, business & arts	22.8%
Service	29.9%
Sales & office	31.0%
Natural resources & construction	6.4%
Production & transportation	9.9%

Employment type

Type	%
Private sector	66.9%
Government	19.2%
Self-employed	13.8%
Unpaid family workers	0.0%

Commute

Method	%
Drive alone	83.2%
Carpool	10.6%
Public transit	0.0%
Walk	0.0%
Other means	2.7%
Avg commute (minutes)	31.7

Poverty

All people 12.7%

Under 18 years 17.3%

18 and over 11.6%

Married-couple families 5.7%

Female-led households 9.3%

Income support

Source	% of households
Social Security	17.0%
Retirement income	20.3%
Supplemental Security	4.1%
Cash public assistance	16.1%
Food stamps / SNAP	19.1%

Health indicators

Condition	%
High blood pressure	36.3%
High cholesterol	34.7%
Heart disease	7.0%
Stroke	3.4%
Asthma	9.4%
Arthritis	23.4%
Kidney disease	3.4%
Pulmonary disease	7.6%
Cancer	5.2%

Behavior / access	%
Binge drinking	17.2%
No physical activity	33.8%
Less than 7 hrs sleep	34.6%
Fair or poor health	23.7%
Poor mental health	16.5%
Poor physical health	14.0%
No health insurance	37.4%
Visited doctor (checkup)	69.3%
Visited dentist	46.2%
Cholesterol screening	87.0%
Teeth loss	18.6%

Veterans & disability

Veterans	Count	%
Civilian veterans	249	8.5%

Disability	%
Any disability	17.3%
Under 18	4.3%
18–64 years	18.2%
65 and over	40.4%

Health insurance coverage

Type	%
Private insurance	57.1%
Public insurance	22.9%
Uninsured under 19	24.7%

Language & origin

Language spoken at home (age 5+)

Language	Count	%
English only	3,368	91.7%
Spanish	513	15.2%
Other Indo-European	486	14.4%
Asian & Pacific Islander	7	0.2%
Other languages	20	0.6%

Place of birth & citizenship

Origin	Count	%
Native born (US)	3,079	83.9%
Born in same state	3,063	83.4%
Born in different state	2,429	66.2%
Foreign born	16	0.4%
Naturalized citizen	592	16.1%
Not a US citizen	120	20.3%

Ancestry

Ancestry	Count	%
French	179	4.9%
Italian	174	4.7%
Arab	81	2.2%

Ancestry	Count	%
English	35	1%
Polish	28	0.8%
German	11	0.3%

Technology access

Metric	% of households
Computer access	38.2%
Internet access	97.1%

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

Frequently asked questions

What is the ZIP code for Martindale, TX?

Martindale, TX has one ZIP code: 78655.

What is the main ZIP code for Martindale, TX?

The primary ZIP code for Martindale, TX is 78655. The city uses area code 512 or 737 for phone service.

What county is Martindale, TX in?

Martindale is located in Caldwell County, Texas.

How many ZIP codes are in Martindale, TX?

Martindale, TX has 1 ZIP code.

What is the ZIP code for Martindale's downtown area and main business district?

Martindale's downtown area is located in ZIP code 78655, which serves as the central hub for this Caldwell County community.

What ZIP code should I use when mailing correspondence to businesses and residences in Martindale, TX?

All mail addressed to Martindale, Texas should use ZIP code 78655, as it is the single ZIP code that covers the entire city.