In 1948, Hall was arrested for possession of marijuana. His trial, held in 1949, resulted in a hung jury.
Hall later played the increasingly buffoonish Horace DeBussy "Sach" Jones in 48 "The Bowery Boys" films, gaining top billing when his longtime partner, Leo Gorcey, left the series in 1956. Hall and Gorcey reunited in Second Fiddle to a Steel Guitar (1966) and The Phynx (1969).
He also appeared in such films as The Return of Doctor X (1939), A Walk in the Sun (1945), Gentle Giant (1967), Herbie Rides Again (1974), and The Manchu Eagle Murder Caper Mystery (1975) opposite Gabriel Dell, another former Bowery Boy.
He was one of the celebrities featured on the cover of The Beatles' 1967 album, Sgt. Pepper's Lonely Hearts Club Band. In 1971, he co-starred with Art Metrano and Jamie Farr in the situation comedy "The Chicago Teddy Bears". His plans to produce a movie series, "The Ghetto Boys" (a take on the "Bowery Boys"), fell through. In 1973, Hall took part in Princess Grace of Monaco's Council for Drug Abuse, part of the Catholic Office of Drug Education.
In 1976, he appeared in Won Ton Ton, the Dog Who Saved Hollywood, and in 1977 he played movie mogul Jesse Lasky in Ken Russell's film Valentino. His later films included Gas Pump Girls (1979) and The Escape Artist (1982), the latter reuniting him with Gabriel Dell. His final film appearance was in Auntie Lee's Meat Pies in 1993. He performed in dinner theater productions and then retired in 1994.
Behind Sach: The Huntz Hall Story by Jim Manago, published by BearManor Media in 2015, is the first biography of Hall.