On May 14, 2011, the city of San Antonio, Texas held an election to choose who would serve as Mayor of San Antonio for a two year term to expire in 2013. Julian Castro, the incumbent Mayor, was re-elected with over 81% of the vote, earning a second term.
Julian Castro, who was first elected mayor in the 2009 mayoral election, opted to seek re-election as mayor. The three main challengers that challenged him in 2009 (Trish DeBerry-Mejia, Diane Cibrian and Sheila McNeil), opted not to seek a re-match, and at the closing of the filing period, faced only four challengers. 
On May 14, 2011, the election for Mayor was held. Julian Castro secured re-election with over 81% of the vote, thus negating the need of a runoff election (which would have been required if no candidate got 50%+1 of all votes cast).