Long Marston is a village and civil parish about 5 miles (8 km) southwest of Stratford-upon-Avon in Warwickshire, England. The southern and western boundaries of the parish form part of the county boundary with Worcestershire. The 2011 census recorded the parish's population as 436.

Gloucestershire is a ceremonial county in South West England. It is bordered by Herefordshire to the north-west, Worcestershire to the north, Warwickshire to the north-east, Oxfordshire to the east, Wiltshire to the south, Bristol and Somerset to the south-west, and the Welsh county of Monmouthshire to the west. The city of Gloucester is the largest settlement and the county town.