Isabela's 3rd congressional district

Isabela's 3rd 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 since 1987. The district consists of the west-central municipalities of Alicia, Angadanan, Cabatuan, Ramon and San Mateo. It is currently represented in the 18th Congress by Ian Paul L. Dy of the Nationalist People's Coalition (NPC).

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

Isabela's 3rd district for the House of Representatives of the Philippines

 * colspan="9" style="text-align:center;" | District created February 2, 1987 from Isabela's at-large district.
 * rowspan="3" style="text-align:center;" | 1
 * style="color:inherit;background:;" |
 * rowspan="3" | Santiago P. Respicio
 * rowspan="3" | June 30, 1987
 * rowspan="3" | June 30, 1998
 * style="text-align:center;" | 8th
 * KBL
 * Elected in 1987.
 * rowspan="10" style="text-align:center;" | 1987–2019 Alicia, Angadanan, Cabatuan, Cauayan, Luna, Reina Mercedes, San Guillermo, San Mateo
 * style="color:inherit;background:;" |
 * style="text-align:center;" | 9th
 * NPC
 * Re-elected in 1992.
 * style="color:inherit;background:;" |
 * style="text-align:center;" | 10th
 * Lakas
 * Re-elected in 1995.
 * style="text-align:center;" | 2
 * style="color:inherit;background:;" |
 * Ramon M. Reyes
 * June 30, 1998
 * June 30, 2001
 * style="text-align:center;" | 11th
 * LAMMP
 * Elected in 1998.
 * rowspan="3" style="text-align:center;" | 3
 * style="color:inherit;background:;" |
 * rowspan="3" | Faustino G. Dy III
 * rowspan="3" | June 30, 2001
 * rowspan="3" | June 30, 2010
 * style="text-align:center;" | 12th
 * Lakas
 * Elected in 2001.
 * rowspan="2" style="color:inherit;background:;" |
 * style="text-align:center;" | 13th
 * rowspan="2" | NPC
 * Re-elected in 2004.
 * style="text-align:center;" | 14th
 * Re-elected in 2007.
 * rowspan="3" style="text-align:center;" | 4
 * rowspan="3" style="color:inherit;background:;" |
 * rowspan="3" | Napoleon S. Dy
 * rowspan="3" | June 30, 2010
 * rowspan="3" | June 30, 2019
 * style="text-align:center;" | 15th
 * rowspan="3" | NPC
 * Elected in 2010.
 * style="text-align:center;" | 16th
 * Re-elected in 2013.
 * style="text-align:center;" | 17th
 * Re-elected in 2016.
 * rowspan="2" style="text-align:center;" | 5
 * rowspan="2" style="color:inherit;background:;" |
 * rowspan="2" | Ian Paul L. Dy
 * rowspan="2" | June 30, 2019
 * rowspan="2" | Incumbent
 * style="text-align:center;" | 18th
 * rowspan="2" | NPC
 * Elected in 2019.
 * rowspan="2" style="text-align:center;" | 2019–present Alicia, Angadanan, Cabatuan, Ramon, San Mateo
 * style="text-align:center;" | 19th
 * Re-elected in 2022.
 * }
 * rowspan="2" style="text-align:center;" | 5
 * rowspan="2" style="color:inherit;background:;" |
 * rowspan="2" | Ian Paul L. Dy
 * rowspan="2" | June 30, 2019
 * rowspan="2" | Incumbent
 * style="text-align:center;" | 18th
 * rowspan="2" | NPC
 * Elected in 2019.
 * rowspan="2" style="text-align:center;" | 2019–present Alicia, Angadanan, Cabatuan, Ramon, San Mateo
 * style="text-align:center;" | 19th
 * Re-elected in 2022.
 * }
 * }