Zachary David Massey (November 14, 1864 – July 13, 1923) was an American politician that represented the 1st congressional district of Tennessee in the United States House of Representatives.
Massey was born on November 14, 1864 in Marshall, North Carolina son of Robert Hardy and Tempa Arena Brown Massey. He attended the public schools.
Massey taught in the public schools of Marshall from 1882 to 1886. He married Sally Josephine Mullendore on November, 25 1886, and they had six children, Beulah, Roy, Blanche, Constance, Juanita, and Robert. He studied medicine in the Louisville (Kentucky) Medical College and commenced the practice of his profession in Wears Valley, Tennessee in 1889. He moved to Sevierville, Tennessee in Sevier County in 1890.
During the Spanish–American War, Massey served as an assistant surgeon with The Sixth Regiment, United States Volunteer Infantry, also known as the "Sixth Immunes." The unit served its term of service in the continental U.S. and in Puerto Rico from 1898 to 1899.