According to the United States Census Bureau, the city has a total area of 21.3square miles (55Square kilometers), of which, 21.2square miles (55Square kilometers) of it is land and 0.05% is water.Fort Bend County operates the Bud O'Shieles Community Center in Rosenberg. The two acre center includes an auditorium, meeting centers, and centers for elderly people. Rosenberg is a city located in the U.S. state of Texas within FortBendCounty and is part of the HoustonSugarLandBaytown metropolitan area. The population was 31,676 at the 2010 census. The community holds the Rosenberg Czech Fest on the first weekend in May and the Fort Bend County fair in October. Rosenberg is named after Henry von Rosenberg who migrated from Switzerland to the United States in 1843. He was the first president of the Gulf, Colorado & Santa Fe Railroad.