John Denis Joseph Moore Jr.[1] (November 10, 1910 – September 12, 1988)[2][3] was an American lawyer, business executive, and United States Ambassador to Ireland (1969–1975).

[3] He traveled to South America and the Soviet Union in 1958 and 1959 with then Vice President Richard Nixon, in an advisory role.

[4] He had the official title of Ambassador Extraordinary and Plenipotentiary, and served in the role until June 30, 1975.

[4] His brother, Richard A. Moore, later served as ambassador to Ireland under President George H. W.

Moore died of bone cancer in Manhattan in 1988,[3] and he was interred in Ireland next to his wife and daughter in Deans Grange Cemetery.