| Election Name: | 1959 Philippine Senate election |
| Country: | Philippines |
| Type: | legislative |
| Ongoing: | no |
| Previous Election: | 1957 Philippine Senate election |
| Previous Year: | 1957 |
| Next Election: | 1961 Philippine Senate election |
| Next Year: | 1961 |
| Election Date: | November 10, 1959 |
| Seats For Election: | 8 (of the 24) seats in the Senate |
| Majority Seats: | 13 |
| Leader1: | Eulogio Rodriguez |
| Party1: | Nacionalista Party |
| Seats Before1: | 20 |
| Seats After1: | 19 |
| Seat Change1: | 1 |
| Popular Vote1: | 17,160,618 |
| Percentage1: | 50.1% |
| Swing1: | 2.9% |
| Leader2: | Ferdinand Marcos |
| Party2: | Liberal Party (Philippines) |
| Seats Before2: | 2 |
| Seats After2: | 4 |
| Seat Change2: | 2 |
| Popular Vote2: | 10,850,799 |
| Percentage2: | 31.7% |
| Swing2: | 0.1% |
| Leader4: | Lorenzo Tañada |
| Party4: | Nationalist Citizens' Party |
| Seats Before4: | 1 |
| Seats After4: | 1 |
| Seat Change4: | |
| Popular Vote4: | 2,029,200 |
| Percentage4: | 5.9% |
| Swing4: | 1.0% |
| Leader5: | Raul Manglapus (lost) |
| Party5: | Progressive Party (Philippines) |
| Seats Before5: | 0 |
| Seats After5: | 0 |
| Seat Change5: | |
| Popular Vote5: | 3,163,609 |
| Percentage5: | 9.2% |
| Swing5: | 2.8% |
| Senate President | |
| Before Election: | Eulogio Rodriguez |
| Before Party: | Nacionalista Party |
| After Election: | Eulogio Rodriguez |
| After Party: | Nacionalista Party |
A senatorial election was held on November 10, 1959 in the Philippines. The 1959 elections were known as the 1959 Philippine midterm elections as the date when the elected officials take office falls halfway through President Carlos P. Garcia's four-year term.
The Liberal Party continued chipping away from the Nacionalista Party's dominance in the Senate, winning two more seats, although the Nacionalistas still possessed 19 out of 24 seats in the chamber.
The Nacionalista Party won five seats contested in the election, while the Liberal Party won two, and the Nationalist Citizens' Party won one.
Lorenzo Tañada of the Nationalist Citizens' Party and Nacionalistas Mariano Jesús Cuenco, Fernando Lopez, and Eulogio Rodriguez defended their Senate seats. Lopez was originally from the Democratic Party, and ran as a Nacionalista on this election.
The two winning Liberals are neophyte senators: Estanislao Fernandez and Ferdinand Marcos. Also entering the Senate for the first time are Nacionalistas Alejandro Almendras and Genaro Magsaysay.
Incumbent Nacionalista senators Edmundo B. Cea and Emmanuel Pelaez both lost.
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| Election result | Not up | LP | bgcolor= | NCP | NP | Not up | |||||||||||||||||||||||||||||||||||||||||||
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