Ventnor () is a seaside resort and civil parish established in the Victorian era on the southeast coast of the Isle of Wight, England, from Newport. It is situated south of St Boniface Down, and built on steep slopes leading down to the sea. The higher part is referred to as Upper Ventnor (officially Lowtherville); the lower part, where most amenities are located, is known as Ventnor. Ventnor is sometimes taken to include the nearby and older settlements of St Lawrence and Bonchurch, which are covered by its town council. The population of the parish in 2016 was about 5,800.