John "Jack" J. McNally Jr. (1928 – November 21, 2018) was an American businessman who worked as the Staff Assistant for Congressional Liaisons during the Presidency of John F. Kennedy.

He served in the United States Army during World War II, and later became president of Webster Enterprises, a heating supplies company.

He served as the Staff Assistant for Congressional Liaisons, and planned international trips.

He also oversaw the State funeral of John F. Kennedy, and left the White House in 1965.

[2] He retired from politics in 1990 and moved to Hilton Head Island, South Carolina.