Lejre is a town with a population of 2,415 (1 January 2015) in Lejre Municipality (Danish, kommune) on the island of Zealand in east Denmark. It belongs to Region Sjælland. The town's Old Norse name was Hleiðra. The municipality has an area of 240 km² and a total population of ca. 26.989 (2014). Its mayor is Mette Touborg, representing the Socialist Peoples Party.