The 2010 Senate election in the Philippines occurred on May 10, 2010 to elect one-half of the Senate. The senators elected in 2010, together with those elected on 2007, will comprise the Senate's delegation in the 15th Congress.
The canvassing of votes for senator was done in record time, attributed partly to the use precinct count optical scanner voting machines; the voting machines were used in a national election for the time, and proclamation for the first nine winners was done five days after Election Day, while the latter three's was done three days later. All incumbents that ran successfully defended their seats, with four former senators and two new senators being elected.
Voting for senators is via nationwide, at-large basis via plurality-at-large voting system. A voter has twelve votes: the voter can vote less than twelve but not more than it. Then 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 took office.
| Place | Senator | Party | Voted at* | Date proclaimed | Religion | Prior congressional and elective executive positions | Born | |
|---|---|---|---|---|---|---|---|---|
| 6th | Pia Cayetano | Nacionalista | Taguig | May 15 | Evangelical Christianity | Senator (2004–10) | 1966 | |
| 3rd | Miriam Defensor Santiago | PRP | Quezon City | May 15 | Roman Catholicism | Senator (1995–2001, 2004–10) | 1945 | |
| 4th | Franklin Drilon | Liberal | Iloilo City | May 15 | Roman Catholicism | Senator (1995–2007; Senate President, 2000, 2001–04) | 1945 | |
| 2nd | Jinggoy Estrada | PMP | San Juan | May 15 | Roman Catholicism | Senator (2004–10), Mayor of San Juan (1992–2001) | 1963 | |
| 12th | Teofisto Guingona III | Liberal | Malaybalay, Bukidnon | May 18 | Roman Catholicism | Member of the House of Representatives from Bukidnon's 2nd district (2004–10) | 1959 | |
| 11th | Lito Lapid | Lakas-Kampi | Porac, Pampanga | May 18 | Roman Catholicism | Senator (2004–10), Governor of Pampanga (1995–2004) | 1955 | |
| 7th | Ferdinand Marcos, Jr. | Nacionalista | Batac, Ilocos Norte | May 15 | Roman Catholicism | Member of the House of Representatives from Ilocos Norte's 2nd district (1992–95, 2007–10), Governor of Ilocos Norte (1983–86, 1998–2007) | 1957 | |
| 10th | Sergio Osmeña III | Independent | Makati | May 18 | Roman Catholicism | Senator (1995–2007) | 1943 | |
| 5th | Juan Ponce Enrile | PMP | Cagayan | May 15 | Roman Catholicism | Senator (1987–92, 1995–2001, 2004–10; Senate President, 2008–10), member of the House of Representatives from Cagayan's 1st district (1992–95) | 1924 | |
| 8th | Ralph Recto | Liberal | Lipa, Batangas | May 15 | Roman Catholicism | Senator (2001–07), member of the House of Representatives from Batangas' 4th district (1992–2001) | 1964 | |
| 1st | Bong Revilla | Lakas-Kampi | Imus, Cavite | May 15 | Roman Catholicism | Senator (2004–10), Governor of Cavite (1998–2001) | 1966 | |
| 9th | Vicente Sotto III | NPC | Quezon City | May 15 | Roman Catholicism | Senator (1992–2004) | 1948 | |
*Senators are elected on a nationwide, at-large basis.
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