 The island is currently part of District 6 of the City and County of San Francisco.According to the United States Census Bureau, Yerba Buena Island and Treasure Island together have a land area of 2.334 km2 (0.901 sq mi) with a total population of 2,500 as of the 2010 census.Today the military reservation southeast of the Yerba Buena Tunnel belongs to the United States Coast Guard (USCG) District Eleven.