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ZIP Code Database - Facts & Stats

Data Last Updated: February 1, 2023

ZIP Codes for City of Markham, TX

Markham, TX Covers 1 ZIP Code

ZIP CodeTypeCountyPopulation
ZIP Code 77456P.O. BoxMatagorda1,303

Timezone(s):Central (GMT -06:00)
Population:1,082 (More Details)
Male Population:539
Female Population:543
Median Age:38
ZIP Codes:1
Area Codes:1
Total Area:1,613 square miles (county)
Land Area:1,100 square miles (county)
Water Area:512 square miles (county)

Markham, TX Demographic Information *

Total population1,082
Male population539
Female population543
Median age (years)37.8
White Population790
Black Population131
Indian Population2
Asian Population0
Hawaiian Population1
Hispanic Population378
Median age (Male)38.1
Median age (Female)37.5
Total households394
Family households (families)289
Average household size2.75
Average family size3.25
Total housing units448
* Demographic data is based on 2010 Census. Products


  1. U.S. Postal Service [Last Updated: 2/1/2023],
  2. Internal Data Creation [Last Updated: 2/1/2023],
  3. U.S. Geological Survey [Updated as needed],
  4. U.S. Census [Updated Yearly],
  5. U.S. Census 2010 [Decennial] [Last Updated: 1/1/2010],