Algarkirk, a parish in Lincolnshire, near Fosdyke Wash, 6 1/2 miles S by W of Boston. It has a station, with Sutter-ton, on the G.N.R. Post town, Boston; money order and telegraph office, Sutterton. Acreage, 2740; population of the civil parish, 469; of the ecclesiastical, with Fosdyke, 902. Algarkirk Hall is a spacious modern dwelling, pleasantly situated in a well-wooded park. The living is a rectory, united with Fosdyke, in the diocese of Lincoln ; gross yearly value, ?£1728. The church is cruciform, with a low central tower; shows successive characters from traces of Norman to Later English; has a beautiful reredos; and contains sedilia and an octagonal font. A stone in the churchyard is said to mark the grave of Algar, Earl of Mercia, who fell in battle against the Danes at Threkingham in 870. Hence the name Algarkirk.