Meonstoke is a village and former civil parish, now in the parish of Corhampton and Meonstoke, in the Winchester district, in the county of Hampshire, England. It is in the Meon Valley where it cuts through the Middle Chalk of the South Downs, Old Winchester Hill is at the edge of the parish to the east. In 1931 the parish had a population of 439.

The River Meon is a chalk stream in Hampshire in the south of England. It rises at East Meon then flows 34 km (21 mi) in a generally southerly direction to empty into the Solent at Hill Head near Stubbington. Above Wickham, the river runs through the South Downs National Park.