List of senators of the Philippines in the 18th Congress by seniority

This is a complete list of senators of the Philippines during the 18th Congress of the Philippines listed by seniority from June 30, 2019, to June 30, 2022.

The criteria for seniority used in this article are derived from the cumulative length of service of a member of the Senate prior to the current Congress. Although an official roster ranking senators by seniority is not publicly available, their total cumulative years of service have been used to determine seniority. It has long been customary, following the practice of the United States Senate, to elect the most senior senator as either president of the Senate or president pro tempore, although this practice has become less common in the modern Senate. Furthermore, seniority is traditionally considered in the selection of chairpersons of major Senate committees.

In cases where senators have equal cumulative service, seniority is determined by the following criteria, in order: Longest uninterrupted period of service Earlier date on which the cumulative length of service was achieved Alphabetical order of surnames

In this Congress, Tito Sotto was the most senior senator, having previously served 21 years in Senate, while Francis Tolentino was the most junior senator.

List of senators by seniority Rank Senator Party Length of previous tenures Notes 1 Tito Sotto NPC 21 years, 0 days Senate president 2 Franklin Drilon Liberal 21 years, 0 days 3 Panfilo Lacson Independent 15 years, 0 days 4 Kiko Pangilinan Liberal 5 Ralph Recto Nacionalista 15 years, 0 days Senate president pro tempore 6 Pia Cayetano Nacionalista 7 Lito Lapid NPC 8 Bong Revilla Lakas 9 Dick Gordon Bagumbayan–VNP 9 years, 0 days 10 Koko Pimentel PDP–Laban 11 Juan Miguel Zubiri Independent 7 years, 34 days 12 Sonny Angara LDP 13 Nancy Binay UNA 14 Grace Poe Independent 15 Cynthia Villar Nacionalista 16 Leila de Lima Liberal 17 Sherwin Gatchalian NPC 18 Risa Hontiveros Akbayan 19 Manny Pacquiao PROMDI 20 Joel Villanueva Independent 21 Ronald dela Rosa PDP–Laban rowspan="4" 22 Bong Go PDP–Laban 23 Imee Marcos Nacionalista 24 Francis Tolentino PDP–Laban

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