77456 is zip code located in Markham, Texas. The population is 1,179, making 77456 the largest zipcode in Markham and the 5th largest in Matagorda County.
There are 0 public schools in 77456 with an average Homefacts rating of B. , and there are 10 registered sex offenders residing in the zip code 77456. Unemployment in 77456 is high.