List of senators of the Philippines in the 19th Congress by seniority

This is a complete list of senators of the Philippines during the 19th Congress of the Philippines listed by seniority from June 30, 2022, to June 30, 2025.

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, Loren Legarda was the most senior senator, having previously served 18 years in Senate, while Mark Villar was the most junior senator.

List of senators by seniority Rank Senator Party Length of previous tenures NotesStart of CongressEnd of Congress 1 Loren Legarda NPC 18 years, 0 days Senate president pro tempore (until May 20, 2024) 2 Pia Cayetano Nacionalista 15 years, 0 days 3 Lito Lapid NPC 4 Bong Revilla Lakas 5 Jinggoy Estrada PMP Senate president pro tempore (from May 20, 2024) 6 Francis Escudero NPC Senate president (from May 20, 2024) 7 Koko Pimentel PDP–Laban Nacionalista 8 Juan Miguel Zubiri Independent 10 years, 34 days Senate president (until May 20, 2024) 9 Alan Peter Cayetano Independent 10 Sonny Angara LDP 11 Nancy Binay UNA 12 Grace Poe Independent 13 Cynthia Villar Nacionalista 14 JV Ejercito NPC 15 Sherwin Gatchalian NPC 16 Risa Hontiveros Akbayan 17 Joel Villanueva Independent 18 Ronald dela Rosa PDP–Laban 19 Bong Go PDP–Laban 20 Imee Marcos Nacionalista 21 Francis Tolentino PDP–Laban PFP 22 Robin Padilla PDP–Laban rowspan="3" 23 Raffy Tulfo Independent 24 Mark Villar Nacionalista

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