ZIP code · Markham · Texas · United States
ZIP code 77456 — Markham
ZIP code 77456 serves Markham, Texas.
- Postal code
- 77456Single source Value from one source, not cross-checked.
- City
- Markham
- County
- Matagorda
- State
- Texas
- Country
- United States
- Coordinates
- 28.9547, -96.0928 — precision precise (locality)
View on OpenStreetMap - Population
- 1,447 (ZCTA, ACS 5-year)
- Median household income
- $53,929
- Median age
- 20.6
- 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.
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). Data generated on 2026-08-21. Methodology · Report an error on this page