Tullyallen (Irish: Tulaigh Álainn, meaning "beautiful hill") is a village and townland 6 km north-west of the town of Drogheda in County Louth, Ireland. It is located in the historical Boyne Valley, in the Catholic parish of Mellifont (named after the nearby Mellifont Abbey); it is also close to Newgrange, Knowth and Dowth burial mounds, Monasterboice monastery, and to the Battle of the Boyne site.