ZIP code · Bayside · Texas · United States
ZIP code 78340 — Bayside
ZIP code 78340 serves Bayside, Texas.
- Postal code
- 78340Single source Value from one source, not cross-checked.
- City
- Bayside
- County
- Refugio FIPS 48391
- State
- Texas
- Country
- United States
- Coordinates
- 28.0968, -97.2106 — precision precise (locality)
View on OpenStreetMap - Population
- 405 (ZCTA, ACS 5-year)
- Population density
- 20 / sq mi
- Land area
- 20.7 sq mi (53.6 km²) (ZCTA, ACS 5-year)
- Median household income
- $55,375
- Per-capita income
- $29,911
- Median age
- 52.3
- Households
- 214
- Housing units
- 323
- Median home value
- $161,200
- Median gross rent
- $1,488 / month
- Congressional district
- TX-27 (119th Congress)
- USDA hardiness zone
- 9b (25 to 30 °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
- 361Telephone 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 78340 with another ZIP · ZIPs within 25 miles · distance from 78340
Map of ZIP code 78340
Climate — monthly normals
Warmest month Aug (avg high 92°F), coldest Jan (avg low 49°F).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 65 | 69 | 74 | 80 | 85 | 90 | 91 | 92 | 89 | 84 | 75 | 68 |
| Avg low °F | 49 | 54 | 60 | 66 | 73 | 78 | 79 | 79 | 75 | 68 | 58 | 51 |
| Precip in | 1.7 | 1.1 | 1.9 | 1.5 | 3.2 | 3.9 | 2.5 | 1.5 | 4.2 | 2.8 | 2.4 | 1.7 |
NOAA 1991–2020 climate normals from the nearest station: ROCKPORT ARANSAS CO AP (10.1 mi) · NOAA NCEI
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