Look up Letterkenny in Wiktionary, the free dictionary.
Letterkenny (Irish: Leitir Ceanainn, meaning "Hillside of the O'Cannons") is a town in County Donegal, Ireland.
Letterkenny may also refer to:
- Letterkenny (TV series), Canadian comedic TV show, and the name of the fictional town in which it is set
- Letterkenny Township, Pennsylvania, a U.S. township named after Letterkenny in Ireland
- Letterkenny, Ontario, an unincorporated community in the township of Brudenell, Lyndoch and Raglan in Ontario, Canada