Valentin Yson Mechilina (born November 13, 1915) is a Filipino composer, conductor, and military musician from Binangonan, Rizal. He is most commonly known for his musical compositions for wind orchestras, particularly for his Dalampasigan overture.
Mechilina was a member of the Philippine Constabulary Band from 1938 to 1955. In June 1955, he became the conductor of the Philippine Air Force Band. During this time, he was also a student of Antonino Buenaventura. He then assumed leadership of the San Miguel Corporation Brass Band from the 1970s up to the 1990s.