Isabela's 5th congressional district

Isabela's 5th congressional district is one of the six congressional districts of the Philippines in the province of Isabela. It has been represented in the House of Representatives of the Philippines since 2019. The district consists of the municipalities of Aurora, Burgos, Luna, Mallig, Quezon, Quirino, Roxas, and San Manuel. It is currently represented in the 18th Congress by Faustino Michael Carlos T. Dy III of the Partido Federal ng Pilipinas (PFP), who has represented the district since its creation.

Representation history
{| class="wikitable" ! rowspan="2" |# ! colspan="2" rowspan="2" |Member ! colspan="2" |Term of office ! rowspan="2" |Congress ! rowspan="2" |Party ! rowspan="2" |Electoral history ! rowspan="2" width="33%" |Constituent LGUs !Start !End
 * colspan="9" style="text-align:center;" |
 * colspan="9" style="text-align:center;" |

Isabela's 5th district for the House of Representatives of the Philippines
Aurora, Burgos, Luna, Mallig, Quezon, Quirino, Roxas, San Manuel
 * colspan="9" style="text-align:center;" |District created September 27, 2018.
 * rowspan="2" style="text-align:center;" |1
 * style="color:inherit;background:;" |
 * rowspan="2" | Faustino Michael Carlos T. Dy III
 * rowspan="2" | June 30, 2019
 * rowspan="2" | Incumbent
 * style="text-align:center;" |18th
 * PFP
 * Elected in 2019.
 * rowspan="2" align="center" |2019–present:
 * Elected in 2019.
 * rowspan="2" align="center" |2019–present:
 * style="color:inherit;background:;" |
 * style="text-align:center;" | 19th
 * NPC
 * Re-elected in 2022.
 * }
 * }