Weslie "Wes" Ting Gatchalian is a Filipino politician who has served as the 27th mayor of Valenzuela since 2022. A member of the Nationalist People's Coalition, Gatchalian was first elected to public office in 2013, as the party-list representative of Alay Buhay Partylist, serving until 2016, where he was elected as the district representative for Valenzuela's 1st district. As a representative, Gatchalian served as House Deputy Speaker from 2020 to 2022.

The mayor of Valenzuela, a highly urbanized city in northern Metro Manila, Philippines, is the official head and chief executive of Valenzuela. He leads on enforcing city ordinances and improving public services. The mayor has a term of office of three years, but has a maximum electoral tenure of three consecutive terms. Inaugural holder of the office was Pío Valenzuela (1869–1956), served from 1899 to 1901, whom the city received its name.