The 2013 Senate election in the Philippines occurred on May 13, 2013 to elect one-half of the Senate. The senators elected in 2013, together with those elected in 2010, comprise the Senate's delegation in the 16th Congress.

The proclamation of all the 12 senators was done three days after Election Day, on May 16. all incumbents that ran successfully defended their seats, while all new senators were elected.

Manner of Election Voting for senators is via nationwide, at-large basis via the plurality-at-large voting system. A voter has twelve votes: the voter can vote less than twelve but not more than it. These votes are tallied nationwide and the twelve candidates with the highest number of votes are elected to the Senate. The Commission on Elections administers elections for the Senate, with the Senate Electoral Tribunal deciding election disputes after a Senator has taken office.

Senators elected in 2013 Key: Boldface: incumbent, italicized: neophyte senator Rank Image Senator Party Coalition Voted at* Date proclaimed Religion Prior congressional and elective executive positions Born 1st Grace Poe Team PNoy San Juan May 16, 2013 Roman Catholic 1968 2nd Loren Legarda Team PNoy Malabon May 16, 2013 Roman Catholic Senator (1998–2004, 2007–2013) 1960 3rd Alan Peter Cayetano Team PNoy Taguig May 16, 2013 Evangelical Charismatic ChristianSenator (2007–2013) Member of the Philippine House of Representatives from Lone District of Taguig-Pateros (1998–2007) Acting Vice Mayor of Taguig (1998–1998) Member of the Taguig Municipal Council from the 1st district (1992–1998) 1970 4th Francis Escudero Team PNoy Sorsogon City May 16, 2013 Roman Catholic Senator (2007–2013) Member of the Philippine House of Representatives from Sorsogon's First District (1998–2007) 1969 5th Nancy Binay UNA Makati May 16, 2013 Roman Catholic 1973 6th Sonny Angara Team PNoy Baler May 16, 2013Roman Catholic Member of the Philippine House of Representatives from Aurora's Lone District (2004–2013) 1972 7th Bam Aquino Team PNoy Quezon City May 17, 2013 Roman Catholic 1977 8th Koko Pimentel Team PNoy Cagayan de Oro May 17, 2013 Roman Catholic Senator (2007–2013) 1964 9th Antonio Trillanes Team PNoy Caloocan May 17, 2013 Roman CatholicSenator (2007–2013) 1971 10th Cynthia Villar Team PNoy Las Piñas May 18, 2013 Roman Catholic Member of the Philippine House of Representatives from Las Piñas' Lone District (2001–2010) 1950 11th JV Ejercito UNA San Juan May 18, 2013 Roman CatholicMember of the Philippine House of Representatives from San Juan City Mayor of San Juan City (2001–2010) 1969 12th Gregorio Honasan UNA Marikina May 18, 2013 Roman CatholicSenator (1995–2004, 2007–2013) 1948 *Senators are elected on a nationwide, at-large basis.