Allonby is a village on the coast of the Allerdale district in Cumbria, England. The village is on the B5300 road  north of Maryport and south of Silloth. The village of Mawbray is to the north, and to the east is the village of Westnewton. The county town of Carlisle is located to the north east. Other nearby settlements include Crosscanonby, Edderside, Hayton, and Salta.