Presidential elections were held in Singapore on 27 August 2011. Incumbent president S. R. Nathan, who had been elected unopposed in 1999 and 2005, did not seek re-election. It was the fourth elected Singaporean presidential election, as well as the second to be contested by more than one candidate.

Presidential elections were scheduled to be held in Singapore on 17 August 2005. 21 application forms for the Certificate of Eligibility required to contest were collected, and forms were submitted by four candidates. After considering the candidate's applications, the Presidential Elections Committee issued only one Certificate of Eligibility to the incumbent, Sellapan Ramanathan.