Coordinates: 52°19′03″N 0°10′21″W / 52.3176°N 0.1725°W / 52.3176; -0.1725

Godmanchester is a small town and civil parish within the Huntingdonshire district of Cambridgeshire, in England. It lies on the south bank of the River Great Ouse, south of the larger town of Huntingdon, and on the A14 road.

The town was on the site of the Roman town of Durovigutum. It was first chartered by King John in 1212, though it had been a market town and royal manor for some years. There is archaeological evidence of Celtic and earlier habitation prior to the establishment of a key Roman town and a Mansio (inn), so the area has probably been continuously occupied for more than 2000 years. The settlement was at a crossroads of Roman roads, with Ermine Street, the Via Devana (from Cambridge, between Colchester and Chester) and a military road from Sandy, Bedfordshire, all passing through. The Roman settlement was sacked by Anglo-Saxons in the third century. In contrast to Huntingdon, there have been vast amounts of archaeological finds in the centre of Godmanchester, which has two conservation areas with a large number of timber-framed Tudor houses, the largest being Tudor Farm, dating from 1600 and restored in 1995.