Peg o' My Heart may refer to:
Peg o' My Heart (play), a 1912 comedy by J. Hartley Manners Peg o' My Heart (1922 film), directed by King Vidor Peg o' My Heart (1933 film), featuring Marion Davies Peg O' My Heart (2024 film), a 2024 Hong Kong film directed by Nick Cheung Peg o' My Heart (song), a popular song published in 1913