The Casals Festival is a classical music event celebrated every year in San Juan, Puerto Rico, in honor of classical musician Pablo Casals.

Pau Casals i Defilló, known in English by his Spanish name Pablo Casals, was a Spanish and Puerto Rican cellist, composer, and conductor. He made many recordings throughout his career of solo, chamber, and orchestral music, including some as conductor, but he is perhaps best remembered for the recordings he made of the Cello Suites by Bach. He was awarded the Presidential Medal of Freedom in 1963 by President John F. Kennedy.