Fennelly died January 22, 1988, aged 96, at his home in Peekskill, New York.
He was survived by his wife, two daughters, four grandsons, and one great-grandson.

His widow, Catherine Fennelly (1892—1988), died five months later, aged 95.
Their remains were interred in Sleepy Hollow Cemetery in Sleepy Hollow, New York.
Fennelly died January 22, 1988, aged 96, at his home in Peekskill, New York. He was survived by his wife, two daughters, four grandsons, and one great-grandson.
His widow, Catherine Fennelly (1892—1988), died five months later, aged 95. Their remains were interred in Sleepy Hollow Cemetery in Sleepy Hollow, New York.
Parker Fennelly