Rockdale is a city in Milam County, Texas, United States. Its population was 5,851 at the 2010 census. It is about 41 miles west of College Station.
In 1873, the town developed as the International-Great Northern Railroad came through the area. Rockdale was named for a nearby rock that stood 12 feet high and had a circumference of 20 feet. Rockdale was incorporated in 1878.
Rockdale is located at 30°39′17″N 97°0′27″W (30.654674, -97.007439).
According to the United States Census Bureau, the city has a total area of 3.1 square miles (8.0 km2), all land.
The climate in this area is characterized by hot, humid summers and generally mild to cool winters. According to the Köppen climate classification, Rockdale has a humid subtropical climate, Cfa on climate maps.
As of the census of 2017, 5,605people, 2,088 households, and 1,395 families were residing in the city. The population density was 1,343.3 people per square mile (670.9/km2). The 2,379 housing units averaged 759.2 per square mile (293.5/km2).