Peter Rasmussen Hallock (November 19, 1924, Kent, Washington – April 27, 2014, Fall City, Washington) was an American organist, choirmaster, liturgist, countertenor, and composer and arranger of church music (anthems, hymns, psalm settings, and music for the Episcopal liturgy).
Though he occasionally gave concerts, lectures, and seminars around the United States, his career was centered in Seattle, Washington.
From 1951 to 1991 he served as organist and choirmaster at St. Mark's Cathedral, Seattle, during which he was conferred the title of Canon Precentor, the first layperson in the Episcopal Church (United States) to be so honored.
After WWII, when he was discharged from the Army,[2] Hallock pursued organ studies at the University of Washington, and also studied at the Royal School of Church Music.
In 1986, with Carl Crosier, he founded Ionian Arts, a music publishing business.