South Newton is a village and civil parish about 4 miles north-west of Salisbury in Wiltshire, England. Topologically it lies between chalk downs to the north-east, and downland with Grovely Wood to the south-west. The village straddles the A36 road and is on the left bank of the River Wylye, which defines much of the western boundary of the parish; the eastern boundary follows the A360 Salisbury-Devizes road.