Wil Castro

{{infobox officeholder

|name = Wil Castro

|office = Minority Leader of the Guam Legislature

|term_start = January 7, 2019

|term_end = January 7, 2021

|predecessor = James Espaldon

|successor = James C. Moylan

|office2 = Member of the Guam Legislature

|term_start2 = January 5, 2017

|term_end2 = January 7, 2021

|birth_name = William Mendiola Castro

|death_date =

|death_place =

|party = Republican

|education = University of Guam {{small|(BA)}}
Harvard Graduate School of Education {{small|(M.Ed)}}

}}

William Mendiola Castro is an American politician who served as senator in the Guam Legislature from 2019 to 2021. During this time, he was the minority leader in the 35th Guam Legislature.https://www.kuam.com/story/26057627/2014/07/Friday/wil-castro A member of the Republican Party, Castro is a former candidate for Guam's at-large congressional district in the 2020 United States House of Representatives election in Guam. He was made Chief of Staff to Governor Ralph Torres.{{cite web | url=https://governor.gov.mp/archived-news/press-releases-archive/governor-torres-appoints-william-m-castro-as-chief-of-staff/ | title=Governor Torres appoints William M. Castro as Chief of Staff | date=3 October 2021 }}