Marble Falls, TX is currently using one area code which is area code 830. Area Code 830 was created from a split of area code 210 and put into service on July 7, 1997.
In addition to Marble Falls, TX area code 830, which has a doughnut shape, serves locations outside the San Antonio metro area. (The city of San Antonio and some suburbs utilize area code 210.) Area code 830 serves the larger communities of Del Rio, Eagle Pass, Kerrville, New Braunfels, and Seguin in addition to many smaller communities within the service area.
Marble Falls, TX is located in Burnet County and observes the Central Time Zone.
View our Times by Area Code tool.