Moreton-in-Marsh is a market town in the Evenlode Valley, within the Cotswolds district and Area of Outstanding Natural Beauty in Gloucestershire, England. Its flat and low-lying site is surrounded by the Cotswold Hills. The River Evenlode rises near Batsford, runs around the edge of Moreton and meanders towards Oxford, where it flows into the river Thames just east of Eynsham.