Longworth Moor was on the South West slope of Turton Moor and the lower land to the SE between the Longworth and Delph Brooks and East of Belmont. The area of the township was 1,654 acres (6.69 km2). There was a Hall but there was no village or hamlet within the township boundary and the land was chiefly pasture. A road from Egerton passed near the south west border and the ancient road from Blackburn to Bolton through Tockholes crossed the township.
Between 1800 and 1900 the population steadily declined from about 250 to about 100.
Thomas Longworth and Dorothy his wife made a settlement of the manor of Longworth and lands there and in Bolton in 1632. Soon afterwards, however, the manor appears to have been sold, probably to Lacy, who recorded a pedigree in 1664 and in 1738 it is named in a settlement of the estates of William Hulton of Over Hulton. It afterwards descended regularly in this family, but in 1907 was purchased by the Corporation of Bolton in connexion with the town's water supply. The Delph reservoir is now being formed in Longworth. This is the reservoir adjacent to Walmsley Chapel.
