Barbara Allen may refer to:
- Barbara Allen (writer), pseudonym used by the writer Vivian Stuart (1914–1986)
- Barbara Allen Rainey (1948–1982), first female to be designated a naval aviator in the U.S. armed forces
- Barbara Allen (politician), American politician, Kansas State Senator
- Barbara Jo Allen (1906–1974), American actress
- Barbara Allen (song), a popular English broadside ballad turned American folk song