Harry Emerson "Dad" Vail, was a rowing (crew) coach at the University of Wisconsin–Madison, United States. The Dad Vail Regatta, held annually in Philadelphia, Pennsylvania, is named in his honor.
Harry Emerson Vail was born in Gagtown, New Brunswick, Canada.
His career is traced in his obituary, which was published in the Wisconsin State Journal on October 8, 1928. It read:
He died in his native Canada.