Rockdale is a city in Milam County, Texas, United States. The population was 5,851 at the 2010 census. It is approximately 41 miles west of College Station.HistoryIn 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.GeographyRockdale is located at .According to the United States Census Bureau, the city has a total area of 3.1sqmi, all land.ClimateThe climate in this area is characterized by hot, humid summers and generally mild to cool winters. According to the Köppen climate classification system, Rockdale has a humid subtropical climate, "Cfa" on climate maps.DemographicsAs of the census of 2000, there were 5,439 people, 2,077 households, and 1,420 families residing in the city. The population density was 1,735.8 people per square mile (670.9/km²). There were 2,379 housing units at an average density of 759.2 per square mile (293.5/km²). The racial makeup of the city was 70.69% White, 14.29% African American, 0.35% Native American, 0.42% Asian, 12.23% from other races, and 2.02% from two or more races. Hispanic or Latino of any race were 21.93% of the population.