Local elections were held in Santiago, Isabela on May 12, 2025, as part of the 2025 Philippine general election. Santiago voters elected a mayor, a vice mayor, and 10 out of 13 councilors of the Santiago City Council.
Mayor.
Incumbent Sheena Tan (Lakas–CMD) is running for a second term. Tan was elected under PDP–Laban with 48.97% of the vote in 2022.
Candidates.
The following candidates are included in the ballot:
Vice mayor.
Incumbent Alvin Abaya (Partido Demokratiko Pilipino) is term-limited. Abaya was re-elected with 49.04% of the vote in 2022.
Candidates.
The following candidates are included in the ballot:
City Council.
The Santiago City Council is composed of 13 councilors, 10 of whom are elected.
Retiring and term-limited councilors.
The following councilors are retiring:
The following board members are term-limited:
Candidates.
The following candidates are included in the ballot: