Tarrant Launceston is a small village and civil parish in north Dorset, England, situated in the Tarrant Valley 5 miles (8.0 km) northeast of Blandford Forum. The parish includes part of Blandford Camp to the west and a few buildings on the northern edge of neighbouring Tarrant Monkton to the south. In the 2011 census the parish had 156 households and a population of 498.