GREENHALGH, a township, joint with Thistleton, in the parish of KIRKHAM, hundred of AMOUNDERNESS, county palatine of LANCASTER, 3 miles (N. W. by N.) from Kirkham, containing 419 inhabitants. There is a school endowed with sundry bequests producing £17 per annum, for which six children are taught. The first earl of Derby erected a castle near the village, of which some slight remains are still visible.