Weslie "Wes" Ting Gatchalian (Chinese: 張僑利; pinyin: Zhāng Qiáolì; born August 11, 1980) 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.

Gatchalian is a member of a political dynasty in the Philippines, being the brother of Senator Win Gatchalian and Social Welfare Secretary Rex Gatchalian, the latter of whom was succeeded by Wes as mayor of Valenzuela in 2022.

Gatchalian was born on August 11, 1980, to industrialist William Gatchalian and Dee Hua Ting. He is the youngest of four siblings, namely Sherwin, Kenneth, and Rexlon. The Gatchalian family identifies as Christian with Dee Hua being a pastor and chairman at their own church called Jesus our Life Ministries in Barangay Maysan, Valenzuela.

He was assistant to the president of Waterfront Hotels and Casinos, the country's largest Filipino-owned first class hotel operator. He was also elected as president and CEO of Wellex Industries Inc.

Gatchalian received a secondary diploma at Xavier High School (1999), took business administration at Bryant University (2000), BA Honours Degree/DipHE Business and operations management second class and second division degree at Oxford Brookes University (2003), master's degree at London Metropolitan University, and took an executive course on legislation at UP-NCPAG.

Gatchalian ran for representative of Valenzuela's 2nd district in 2007, losing to former Representative Magi Gunigundo.

He was elected representative for the Alay Buhay Partylist in 2013.

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