Frank Ely Gaebelein (March 31, 1899 – January 19, 1983) was an American evangelical educator, author, and editor who was the founding headmaster of The Stony Brook School in Long Island, New York.

Toward the end of his tenure at Stony Brook, Gaebelein and the school came under pressure from fundamentalists because of their embracing "new evangelicalism".

One of the leaders of this movement, Harold Ockenga, invited Gaebelein to be the dean of the newly founded Fuller Theological Seminary, an offer he considered but ultimately declined.

[1] Gaebelein served on the executive committee of evangelist Billy Graham's famous sixteen-week crusade at Madison Square Garden in 1957.

While covering the 1965 Selma to Montgomery marches during the Civil Rights Movement, he was criticized for abandoning his role as a reporter and joining as a protester.

In 1971, he took on the role as general editor for the Expositor's Bible Commentary, an endeavor he continued until his death (supervising, in order of publication, volumes 10, 11, 1, 9, and 12).