a village in the county of Middlesex, 4 miles N.W. of London. Its pleasant situation, on a considerable eminence commanding extensive views, and the salubrity of its atmosphere, render it a favourite place of residence and of resort. The hill, on the southern slope of which the village stands, is the loftiest site near the metropolis, being 443 feet above the level of the Thames, or 36 feet higher than the cross of St Paul's. The extensive heath on the summit of the hill covers an area of about 280 acres. The streets are mostly narrow and tortuous, lined with houses of all kinds, from the mere cottage to the spacious mansion. The parish church, erected in 1747, and enlarged in 1844, is a building in the Italian style, having accommodation for 1600 persons. East of the town is a mineral spring which was in high repute during the seventeenth century; at which time Hampstead was a fashionable watering-place. In the vicinity are numerous villas. Pop. of parish (1851) 11,986.