Laytown-Bettystown-Mornington is a census town in County Meath, Ireland, comprising the adjoining villages of Laytown, Bettystown and Mornington. It had a population of 5597 at the 2002 census. The coastline stretches from the River Boyne, which borders County Louth to the River Delvin, which borders County Dublin. This stretch of beach is 11 km (7 mi) long and constitutes the whole County Meath coastline.