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William Mendiola Castro

Senator

RepublicanSenatorBallot No. 15

Ballot name / slogan: “Wil”

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Candidate summary

William "Wil" Mendiola Castro is a Guam Republican politician and educator who served as a senator (2017–2021), including as Minority Leader of the 35th Legislature, and was the Republican candidate for Guam's U.S. House seat in 2020. He later served as Chief of Staff to CNMI Governor Ralph Torres.

Election snapshot

Office soughtSenator
PartyRepublican
IncumbentNo
On the ballotPrimary — Aug 1, 2026
Number on the ballotNo. 15
Ballot name“Wil”

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Compiled from public sources; not verified by the candidate.

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