Knotty Ash is a small area on the eastern fringe of Liverpool and neighbouring districts include West Derby, Old Swan, Broadgreen and Dovecot.
It derived its name from a gnarled ash tree, and was made famous in the United Kingdom by stand-up comedian and local resident Ken Dodd and his Diddy Men concept. In 2004, Mr Dodd planted a new ash tree close to the site of the original (outside the Knotty Ash pub). According to the 1969 BBC children's television programme Ken Dodd And The Diddymen, the fictitious Diddyland, boasting the highest sunshine rate in the world, was situated in the centre of Knotty Ash.
Knotty Ash is mentioned in the lyrics of the song "Liverpool Lullaby" by Cilla Black.