|<center>Roger G. Mercado
|-
|<center>Rosette Y. Leria{{efn|group=l3|
Pinalitan si Mercado ayomayon sa desisyon ng [[Kapulungan ng mga Kinatawan ng Pilipinas|House of Representatives Electoral Tribunal]] (HRET) decision onnoong OctoberOktubre 15, 1991.}}
|-
|<center><small>[[9thIkasiyam Congressna ofKongreso theng PhilippinesPilipinas|9thIkasiyam Congressna Kongreso]]</small><br>[[1992]]–[[1995]]
|rowspan=2|<center>Roger G. Mercado
|-
|<center><small>[[10thIkasampung CongressKongreso ofng the PhilippinesPilipinas|10thIkasampung CongressKongreso]]</small><br>[[1995]]–[[1998]]
|-
|<center><small>[[11thIka-11 Congressna ofKongreso theng PhilippinesPilipinas|11thIka-11 Congressna Kongreso]]</small><br>[[1998]]–[[2001]]
|rowspan=2|<center>Aniceto G. Saludo, Jr.
|-
|<center><small>[[12thIka-12 Congressna ofKongreso theng PhilippinesPilipinas|12thIka-12 Congressna Kongreso]]</small><br>[[2001]]–[[2004]]
|-
|<center><small>[[13thIka-13 Congressna ofKongreso theng PhilippinesPilipinas|13thIka-13 Congressna Kongreso]]</small><br>[[2004]]–[[2007]]
|rowspan=3|<center>Roger G. Mercado
|-
|<center><small>[[14thIka-14 Congressna ofKongreso theng PhilippinesPilipinas|14thIka-14 Congressna Kongreso]]</small><br>[[2007]]–[[2010]]
|-
|<center><small>[[15thIka-15 Congressna ofKongreso theng PhilippinesPilipinas|15thIka-15 Congressna Kongreso]]</small><br>[[2010]]–[[2013]]
|-
|<center><small>[[16thIka-16 Congressna ofKongreso theng PhilippinesPilipinas|16thIka-16 Congressna Kongreso]]</small><br>[[2013]]–[[2016]]
|<center>Damian G. Mercado
|-
|<center><small>[[17thIka-17 Congressna ofKongreso theng PhilippinesPilipinas|17thIka-17 Congressna Kongreso]]</small><br>[[2016]]–[[2019]]
|<center>Roger G. Mercado
|}
'''Notes'''
{{notelist|group=3}}
== At-large (''defunct'') ==
|