Below is a list of Markham TX zip codes. For your research we have also included Markham Area Code, Time Zone, UTC and the local Matagorda County FIPS Code. Each Markham Texas zip code has a center Longitude / Latitude point (the Markham center is -96.066398620605 / 28.961799621582). For your convenience we have also indicated if that zip code in Markham observes Daylight Savings time.