Southwest of Houston, Rosenberg was founded on a site in the original Mexican land grant of early settler Henry Scott. The town developed after the Gulf, Colorado & Santa Fe Railroad arrived in 1880 and built a station where it crossed the Buffalo, Brazos & Colorado Railroad. In 1883, the GC&SF Railroad platted a site named after the railroad's president, Henry von Rosenberg. R.T. Mulcahy called the Father of Rosenberg"arrived in 1883 and promoted schools, business and government. In 1912, one of the first Boy Scout troops in Texas was chartered here. By 1920, oil and sulphur discoveries along with highway development made Rosenberg a center of trade and steady growth. And in the 1940s Rosenberg was known as the "Hub of the Gulf Coast."
Rosenberg is home to the Fort Bend County Fair. Other events include the Family Fourth Independence Day Celebration, Houston Glass Club's Festival of Glass and Antique Show and Sale in August, and the Spring Fling Car Show in April.