Castle Acre is a village and civil parish in the English county of Norfolk. The village is situated on the River Nar some north of the town of Swaffham. It is east of the town of King's Lynn, west of the city of Norwich, and from London.
The village is best known today for the twin ruins of Castle Acre Castle and Castle Acre Priory, which lie immediately to the east and west of the village respectively. Both were founded soon after the Norman Conquest by William de Warenne, the first Earl of Surrey. At its heyday, Castle Acre played an important role in the affairs of the State, with many visits from royalty. Castle Acre itself was once a fortified town and still possesses one of its gates, the Bailey Gate. When first established, Castle Acre was one of the finest examples of Norman town planning in the country, and much of this can still be seen.
The civil parish has an area of and in the 2001 census had a population of 799 in 370 households. The parish shares boundaries with the adjacent parishes of Rougham, Great Massingham, West Acre, South Acre, Newton by Castle Acre and Lexham. The parish falls within the district of King's Lynn and West Norfolk. Local government responsibilities are shared between the parish, district and county councils. Castle Acre forms part of the North West Norfolk constituency, represented by Henry Bellingham (Conservative). Norfolk County Council is responsible for roads, some schools, and social services, and the county councillor for the Gayton division, including Castle Acre, is Richard Toby Coke (UKIP).