Satyagraha (; Sanskrit सत्याग्रह, satyāgraha "insistence on truth") is a 1980 opera in three acts for orchestra, chorus and soloists, composed by Philip Glass, with a libretto by Glass and Constance DeJong.

Loosely based on the life of Mahatma Gandhi, it forms the second part of Glass's "Portrait Trilogy" of operas about men who changed the world, which also includes Einstein on the Beach and Akhnaten.

Glass's style can broadly be described as minimalist. The work is scored for 2 sopranos, 2 mezzo-sopranos, 2 tenors, a baritone, 2 basses, a large SATB chorus, and an orchestra of strings and woodwinds only, no brass or percussion. Principal roles are Sonja Schlesin, Mahatma Gandhi, Hermann Kallenbach and Parsi Rustomji.

The title refers to Gandhi's concept of nonviolent resistance to injustice, satyagraha, and the text, from the Bhagavad Gita, is sung in the original Sanskrit. In performance, translation is usually provided in supertitles.