List of senators of the Philippines in the 8th Congress by seniority

This is a complete list of senators of the Philippines during the 8th Congress of the Philippines listed by seniority from June 30, 1987, to June 30, 1992.

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, Jovito Salonga was the most senior senator, having previously served six years in the pre-martial law Senate, while Victor Ziga was the most junior senator.

List of senators by seniority Rank Senator Party Length of previous tenures Notes Start of Congress End of Congress 1 Jovito Salonga Liberal Senate president (until January 18, 1992) 2 Raul Manglapus NUCD Resigned on October 9, 1987, upon being appointed as Secretary of Foreign Affairs. 3 Mamintal A. J. Tamano Nacionalista LDP Took office on July 6, 1987. 4 Ernesto Maceda PDP–Laban NPC Senate president pro tempore (from January 18, 1992) 5 John Henry Osmeña Liberal NPC 6 Heherson Alvarez LnB LDP rowspan="19" 7 Edgardo Angara Independent LDP 8 Butz Aquino BANDILA LDP 9 Joseph Estrada Liberal NPC 10 Neptali Gonzales UNIDO LDP Senate president (from January 18, 1992) 11 Teofisto Guingona Jr. Liberal LDPSenate president pro tempore (until July 23, 1990) 12 Ernesto Herrera Liberal LDP 13 Sotero Laurel UNIDO NacionalistaSenate president pro tempore (July 23, 1990 – January 18, 1992) 14 Joey Lina UNIDO LDP 15 Orly Mercado Liberal LDP 16 Vicente Paterno PDP–Laban 17 Nene Pimentel PDP–Laban 18 Juan Ponce Enrile Nacionalista Took office on August 15, 1987. 19 Leticia Ramos-Shahani UNIDO Lakas 20 Nina Rasul Liberal Lakas Took office on July 26, 1987. 21 Alberto Romulo UNIDO LDP 22 Rene Saguisag Liberal 23 Wigberto Tañada Liberal 24 Victor Ziga UNIDO Liberal

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