Henry Gross (born April 1, 1951) is an American singer-songwriter best known for his association with the group Sha Na Na and for his hit song, "Shannon". He was the youngest person, at age 18, to play on the main stage at the Woodstock Music & Art Fair in 1969.
Gross was born in Brooklyn, New York City, New York. His mother's love for music encouraged his pursuit of a performing career. By age 14, he was playing regularly in local clubs in the New York area, and spending his summers playing at Catskill Mountains resort hotels.
At age 18, while a student at Brooklyn College, Gross became a founding member of Sha Na Na, playing guitar and wearing the greaser clothes he wore while a student at Midwood High School.