Pest control · San Marcos, Texas
Pest control in San Marcos, TX
Termites, ants, roaches, scorpions or rodents? 35% of San Marcos's homes are detached houses[1], and 33% were built since 2010. Request a licensed pest-control company that services the area. San Marcos, in Hays County and Caldwell County and Guadalupe County — ZIP 78666, counts 77,830 residents (2025 estimate)[2].
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Answer a few questions to see what to do first.
The San Marcos pest control picture in brief
- Population (2025 est.)
- 77,830[2]+14.9% since 2020
- County
- Hays / Caldwell / Guadalupe[2]city spans more than one county
- Land area
- 40.4 sq mi[3]
- Detached single-family homes
- 35%[1]the lowest share of the 15 Austin-area suburbs we cover
- Homes built 2010 or later
- 33%[1]the 3rd-lowest share of the 15 Austin-area suburbs we cover
- Households renting
- 69%[1]2020–2024
- Population change, 2020–2025
- +14.9%[2]the 6th-slowest-growing of the 15 Austin-area suburbs we cover
- Land area
- 40.4 sq mi[3]city limits
What the local data means for pest control in San Marcos
San Marcos counts 77,830 residents (2025 estimate), growing at a middle-of-the-pack 14.9% since 2020[2]. It covers 40.4 square miles (1,925 residents per square mile, the 9th densest), spans Hays County and Caldwell County and Guadalupe County, in ZIP code 78666[3].
Building amid 14.9% growth since 2020 pushes construction into previously open land, which stirs up the pests already living there — and denser housing gives them more neighboring homes to visit.
One ZIP code covers the whole city: 78666[4].
The tracked suburbs closest by are Kyle (8.9 mi N), Buda (14.8 mi N) and Dripping Springs (24.2 mi NW)[3].
35% of San Marcos's 30,349 housing units are detached houses[1] — the lowest share of the 15 Austin-area suburbs we cover; nearby, Kyle (75%), Buda (86%), and Dripping Springs (54%). With more attached housing, pests move between units — whole-building treatment matters more.
33% of homes were built in 2010 or later[1] (the 3rd-lowest share of the 15 Austin-area suburbs we cover; Kyle (50%), Buda (58%), and Dripping Springs (67%) nearby), and population changed +14.9% from 2020 to 2025[2]. Most houses here are past any builder termite warranty.
About 1,925 people live per square mile of land across 40.4 square miles[2][3] — the 7th-least dense of the 15 Austin-area suburbs we cover. More yard between houses puts the focus on the foundation perimeter and entry points.
69% of households rent and 31% own[1]. Renters: check the lease for who handles pest control.
Among the 15 suburbs tracked here, San Marcos stands out for the lowest share of detached houses (35%)[1], the oldest housing (by median year built) (2001)[1], and the highest renter share (69%)[1].
Finding pest control help around San Marcos
Your request reaches Pest control contractors who serve San Marcos (ZIP code 78666).
Before you call: choosing a pest-control plan
The data underneath this San Marcos page
| Measure | San Marcos | Median of 15 | Difference |
|---|---|---|---|
| Renter-occupied | 69% | 31% | 39 pts higher |
| Detached single-family | 35% | 74% | 39 pts lower |
| Flood reports (10 mi) | 21 | 17 | 4 more |
| Growth since 2020 | 14.9% | 18.2% | 3 pts slower |
| Residents per sq mi | 1,925 | 2,156 | 11% less dense |
| Median year built | 2001 | 2010 | 9 years older |
Sorted by largest difference. Each median is the middle value across the covered Austin-area suburbs, from the same sources.
| City | People / sq mi | Growth since 2020 | Population |
|---|---|---|---|
| San Marcos | 1,925 | 14.9% | 77,830 |
| Kyle 8.9 mi | 2,156 | 53.0% | 69,917 |
| Buda 14.8 mi | 1,654 | 6.8% | 16,166 |
| Dripping Springs 24.2 mi | 1,267 | 126.5% | 11,167 |
| Bee Cave 30.0 mi | 971 | -7.4% | 8,464 |
| Lakeway 33.4 mi | 1,478 | -0.9% | 19,027 |
| Measure | Value |
|---|---|
| Housing units | 30,349 |
| Detached single-family | 10,628 (35%) |
| Occupied homes | 28,013 |
| Owner-occupied | 8,630 (31%) |
| Renter-occupied | 19,383 (69%) |
| Median home value | $310,400 |
ACS 2020–2024 estimates.
| Built | Units | Share | Margin of error |
|---|---|---|---|
| 2020 or later | 2,153 | 7.1% | ±467 |
| 2010 to 2019 | 7,830 | 25.8% | ±774 |
| 2000 to 2009 | 5,734 | 18.9% | ±792 |
| 1990 to 1999 | 3,327 | 11.0% | ±623 |
| 1980 to 1989 | 4,319 | 14.2% | ±725 |
| 1970 to 1979 | 2,839 | 9.4% | ±548 |
| 1960 to 1969 | 1,341 | 4.4% | ±344 |
| 1950 to 1959 | 1,357 | 4.5% | ±308 |
| 1940 to 1949 | 742 | 2.4% | ±319 |
| 1939 or earlier | 707 | 2.3% | ±237 |
ACS 2020–2024 estimates; margins of error are the Census Bureau's 90% intervals.
| ZIP (ZCTA) | Share of San Marcos's land | Share of the ZIP inside the city |
|---|---|---|
| 78666 | 91% | 17% |
pest control questions from San Marcos homeowners
My San Marcos home is new — do I need termite protection?
Check your closing documents for a builder termite pre-treatment and warranty first. 33% of San Marcos homes were built in 2010 or later[1].
I rent in San Marcos. Who pays for pest control?
Your lease decides. 69% of San Marcos households rent[1].
Which areas does this page cover?
ZIP 78666[4], Hays County. Nearest suburbs with their own pages: Kyle (8.9 mi), Buda (14.8 mi), and Dripping Springs (24.2 mi)[3].
A lot of San Marcos homes predate 1980 — what does that mean for termite pre-treatment work?
23% of San Marcos's housing units were built before 1980, 9.2% before 1960[1] — the highest share of the 15 Austin-area suburbs we cover. Older houses tend to have more gaps at the foundation, eaves and utility penetrations — ask the inspector to show you the entry points, not just treat.
I rent in San Marcos. Who arranges the repair?
69% of occupied San Marcos homes are rented[1], the highest share of the 15 Austin-area suburbs we cover. Tell your landlord or property manager in writing first; your lease says who arranges repairs.
Sources
- Census ACS 2020–2024 5-year (keyless bulk)
- Census population estimates, Vintage 2025
- Census Gazetteer 2025
- Census 2020 ZCTA–place file
- NOAA Storm Events Database
Data pulled Sep 28, 2026. Full citations and method.