Lowell Mason (January 8, 1792 - August 11, 1872) was a leading figure in American church music, the composer of over 1600 hymns, many of which are often sung today. He was also largely responsible for introducing music into American public schools, and is considered to be the first important music educator in the United States. In the last part of his career, as music director of the Fifth Avenue Presbyterian Church in New York City, he radically transformed American church music from a practice of having professional choirs and accompaniment to congregational singing accompanied by organ music.

Mason was born and grew up in Medfield, Massachusetts, but spent the first part of his adulthood in Savannah, Georgia, where he worked first in a dry-goods store, then in a bank. He had very strong amateur musical interests, and studied music with the German teacher Frederick L. Abel, eventually starting to write his own music. He also became a leader in the music of the Independent Presbyterian Church, where he served as choir director and organist. Under his initiative, his church also created the first Sunday school for black children in America.

Following an earlier British model, Mason embarked on the task of producing a hymnal whose tunes would be drawn from the work of European classical composers such as Haydn and Mozart. Mason had great difficulty in finding a publisher for this work. Ultimately, it was published (1822) by the Handel and Haydn Society of Boston, which was one of the earliest American organizations devoted to classical music. Mason's hymnal turned out to be a great success. The work was at first published anonymously—Mason felt that his main career was as a banker, and he hoped not to damage his career prospects.