Zip code 78664

Zip code 78664, TX

The zip code 78664, type standard, belongs to the following denominations: Round Rock, Old Round Rock, Three Point . It is part of the county Williamson County, state of Texas. It has an estimated population of 54060.

The postal code 78664 has several names. If you are going to use the postal service be sure to use only those denominations marked as official (Round Rock).