"Johnny I Hardly Knew Ye" (also known as "Johnny We Hardly Knew Ye" or "Johnny I Hardly Knew Ya") is a popular song, sung to the same tune as "When Johnny Comes Marching Home". First published in London in 1867 and written by Joseph B. Geoghegan, a prolific English songwriter and successful music hall figure, it remained popular in Britain and Ireland and the United States into the early years of the 20th century.
The song was recorded by Tommy Makem on The Newport Folk Festival, Vol. 1, The Clancy Brothers & Tommy Makem on their first album in 1961, Bud & Travis on their In Concert album (1960), The Chad Mitchell Trio (1961), The Irish Rovers on their album Live In Concert (2003), Janis Ian on her Essential Janis Ian album (2009) and others.