Seaborough is a small village and civil parish in the county of Dorset in southwest England. It is sited in the valley of the River Axe and lies within the West Dorset administrative district about 2 miles (3.2 km) south of Crewkerne in Somerset. The parish was previously part of the hundred of Crewkerne, but was transferred to within Dorset in 1896. In 2013 the estimated population of the civil parish was 60.