Charlbury is a town and civil parish in the Evenlode valley, about 6 miles (10 km) north of Witney in the West Oxfordshire district of Oxfordshire, England. It is on the edge of Wychwood Forest and the Cotswolds. The 2011 Census recorded the parish's population as 2,830.

The River Evenlode is a tributary of the Thames in Oxfordshire. It rises near Moreton-in-Marsh, Gloucestershire, in the Cotswold Hills and flows south-east to the Thames, its valley providing the route of the southern part of the Cotswold Line. The river flows for 45 miles (72 km) from source to the River Thames.