[2] Zamboanga del Norte's 1st congressional district is found in the northern part of the province.

Jalosjos, who was accused of rape in 1996, was originally convicted by the Makati Regional Trial Court, and sentenced to two life terms aside from penalties from six counts of lasciviousness, but still won reelection in 2001.

[3] Four candidates filed the paperwork to run for the vacant seat:[4] Carreon won via landslide, earning 64,000 votes.

She was sworn in by President Gloria Macapagal Arroyo on August 29 at Sergio Osmeña, Zamboanga del Norte.

[9] Romeo Jr. was proclaimed winner in 2022, but vacated the seat later on due to pending disqualification cases against his opponents.