LAINSTON, an extra-parochial district, formerly a parish, in the hundred of Mansbridge, union of Winchester, Romsey and S. divisions of the county of Southampton, 3 miles (N. W.) from Winchester; containing 96 inhabitants. It comprises by computation 155 acres of freehold land, of which about 110 are arable, 40 pasture, and the remainder wood. Lainston House, built in the reign of Charles II., and corresponding in style to the palace which that monarch partly erected at Winchester, is now occupied as a private asylum for insane persons; it is situated in a demesne of 40 acres, richly wooded, and is approached by three lofty avenues of trees, of which the central is about half a mile, and the lateral about a quarter of a mile each in length. Near the house are the remains of the ancient church, now a ruin, in which the piscina is still preserved; the inhabitants attend divine service in the church at Sparsholt. The living is a discharged rectory, valued in the king's books at £2. 13. 4.; net income, £34; patron, Sir F. H. Bathurst.