Rockdale is a city in Milam County, Texas, United States. The population was 5,440 at the 2000 census.
Rockdale was the site of a large Alcoa smelting operation, which could produce 1.67 million pounds of aluminum per day. The ALCOA plant was closed in late 2008 - early 2009.
Author George Sessions Perry was born in Rockdale on May 5, 1910, and lived much of his life there. Mary Sue Whipp Hubbard, the third wife of L. Ron Hubbard, was a Rockdale native.