Foy died of natural causes at his home in Woburn, Mass., his daughter told the news agency.
A Detroit native, Foy began his radio career in 1942 before he was drafted into Army later that year. He served in the Armed Forces Radio unit during World War II.
Foy landed the job on The Long Ranger in 1948, leading in every show with: "A fiery horse with the speed of light, a cloud of dust and a hearty 'Hi-Yo Silver!' ... The Lone Ranger!"
Radio historian Jim Harmon called Foy "perhaps the greatest announcer-narrator in the history of radio drama." In his book, Radio Mystery and Adventure and Its Appearances in Film, Television and Other Media, Harmon said Foy "pronounced words like no one else ever had — 'SIL-ver,' 'hiss-TOR-ee.' But hearing him, you realized everyone else had been wrong."
Foy also performed on radio series such as The Green Hornet, and later worked for ABC as the announcer on The Dick Cavett Show and narrating documentaries.
Foy is survived by his wife of 63 years, Francis, their three children and three grandchildren.