San Benito is a city in Cameron County, Texas, United States. The population was 24,250 at the 2010 census. It is the birthplace of Country and Tex-Mex music icon Freddy Fender. San Benito celebrated the 100th anniversary of the naming of the city April 3, 2007. The Post office was named Diaz from April to May 1907. The San Benito Museum, Freddy Fender Museum and Conjunto Music Museum opened in the same building Nov. 17, 2007. According to the United States Census Bureau, the city has a total area of 11.2square miles (29Square kilometers), of which, 11.0square miles (28Square kilometers) of it is land and 0.2 square miles (0.52Square kilometer) of it (1.87%) is water. San Benito is also known as "The Resaca City", due to its resaca (a former tributary of the Rio Grande, which has been cut off for irrigation purposes). San Benito is part of the BrownsvilleHarlingen Metropolitan Statistical Area.