ZIP code · Mertens · Texas · United States
ZIP code 76666 — Mertens
ZIP code 76666 serves Mertens, Texas.
- Postal code
- 76666Single source Value from one source, not cross-checked.
- City
- Mertens
- County
- Hill FIPS 48217
- State
- Texas
- Country
- United States
- Coordinates
- 32.0275, -96.8981 — precision precise (locality)
View on OpenStreetMap - Population
- 245 (ZCTA, ACS 5-year)
- Population density
- 9 / sq mi
- Land area
- 28.1 sq mi (72.8 km²) (ZCTA, ACS 5-year)
- Median household income
- $43,889
- Per-capita income
- $22,275
- Median age
- 29.9
- Households
- 82
- Housing units
- 105
- Median home value
- $91,500
- Congressional district
- TX-6 (119th Congress)
- USDA hardiness zone
- 8b (15 to 20 °F)Planting / growing zone from the 2023 USDA Plant Hardiness Zone Map: average annual extreme minimum temperature, 1991–2020.
- Time zone
- America/Chicago (UTC−6 / UTC−5 DST)
- Area code
- 254 (from the nearest rate centre)Telephone area codes serving this ZIP (NANPA central-office assignments). A ZIP and an area code are different boundaries; at a border both codes may apply.
Tools: compare 76666 with another ZIP · ZIPs within 25 miles · distance from 76666
Map of ZIP code 76666
Climate — monthly normals
Warmest month Aug (avg high 97°F), coldest Jan (avg low 34°F).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 59 | 63 | 70 | 77 | 84 | 92 | 96 | 97 | 91 | 80 | 69 | 60 |
| Avg low °F | 34 | 38 | 45 | 53 | 62 | 70 | 73 | 73 | 66 | 55 | 44 | 36 |
| Precip in | 2.7 | 2.8 | 3.6 | 3.7 | 4.5 | 3.6 | 1.6 | 2.2 | 3.1 | 5.0 | 2.7 | 3.1 |
NOAA 1991–2020 climate normals from the nearest station: HILLSBORO (12.4 mi) · NOAA NCEI
Places in ZIP 76666
- 1 parks
- 1 playgrounds
- 1 post offices
- 1 places of worship
Places mapped inside this ZIP’s ZCTA area in OpenStreetMap. OSM is community-maintained: counts reflect what has been mapped, and completeness varies by area — treat them as at-least figures. © OpenStreetMap contributors (ODbL) · Methodology
About this page
US ZIP codes have five digits. They are postal routing areas, not administrative boundaries: a ZIP can span more than one city or county, and the city shown is the primary USPS name for that code.
GeoNames · U.S. Census Bureau (ACS) · U.S. Census Bureau · NOAA NCEI · usda-phzm. Data generated on 2026-08-21. Methodology · Report an error on this page