It covers an area of and had a population of 339 in 141 households as of the 2001 census. For the purposes of local government, it falls within the district of King's Lynn and West Norfolk. Norfolk County Council is in charge of roads, some schools, and social services, and the county councillor is Richard Toby Coke. For Westminster elections the parish forms part of the North West Norfolk constituency, represented by Henry Bellingham.
The place-name 'Wormegay' is first attested in the Domesday Book of 1086, and means 'the island of Wyrm's people'.