ZIP code · Calvert · Texas · United States
ZIP code 77837 — Calvert
ZIP code 77837 serves Calvert, Texas.
- Postal code
- 77837Single source Value from one source, not cross-checked.
- City
- Calvert
- County
- Robertson FIPS 48395
- State
- Texas
- Country
- United States
- Coordinates
- 30.9782, -96.6711 — precision precise (locality)
View on OpenStreetMap - Population
- 1,347 (ZCTA, ACS 5-year)
- Population density
- 11 / sq mi
- Land area
- 117.8 sq mi (305.2 km²) (ZCTA, ACS 5-year)
- Median household income
- $66,250
- Per-capita income
- $33,596
- Median age
- 48.7
- Households
- 586
- Housing units
- 865
- Median home value
- $113,100
- Median gross rent
- $913 / month
- Congressional district
- TX-17 (119th Congress)
- USDA hardiness zone
- 9a (20 to 25 °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
- 979Telephone 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 77837 with another ZIP · ZIPs within 25 miles · distance from 77837
Map of ZIP code 77837
Climate — monthly normals
Warmest month Aug (avg high 96°F), coldest Jan (avg low 39°F).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 60 | 65 | 71 | 79 | 85 | 92 | 95 | 96 | 91 | 81 | 69 | 62 |
| Avg low °F | 39 | 44 | 50 | 57 | 65 | 71 | 73 | 73 | 68 | 58 | 48 | 41 |
| Precip in | 3.5 | 2.8 | 3.8 | 2.7 | 4.7 | 3.7 | 1.6 | 3.0 | 3.0 | 4.7 | 3.3 | 3.8 |
NOAA 1991–2020 climate normals from the nearest station: FRANKLIN (11.4 mi) · NOAA NCEI
Places in ZIP 77837
- 4 schools
- 1 parks
- 12 places of worship
- 1 banks
- 3 gas stations
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