The Lammefjord is a former body of water in Denmark at the base of the Odsherred peninsula. Previously a deeply branched arm of the sea leading west from the Isefjord, most of it is now reclaimed as agricultural land. The eastern third, outside the dyke at Avdebo, is still sea, but the name Lammefjorden now usually refers only to the dry part west of the dyke.

The Lammefjord is a former body of water in Denmark at the base of the Odsherred peninsula. Previously a deeply branched arm of the sea leading west from the Isefjord, most of it is now reclaimed as agricultural land. The eastern third, outside the dyke at Avdebo, is still sea, but the name Lammefjorden now usually refers only to the dry part west of the dyke.