Headland Archaeology (UK) Ltd undertook a geophysical (magnetometer) survey of a 9 hectare site at Great Ponton, Lincolnshire, to inform a planning application for the development of the site. No anomalies of clear archaeological potential have been identified and none to suggest the presence of any archaeological activity along Ermine Street Roman Road which forms the eastern site boundary. Isolated areas of magnetic enhancement in the north of the site have been ascribed some archaeological potential, perhaps being due to pits, although a geological or pedological origin is equally plausible. At least two regimes of ridge and furrow cultivation have been detected as series of slightly sinuous parallel trends. These are of likely post-medieval, or earlier medieval, origin and may be of local historic interest but are not thought to be of any archaeological significance. Therefore, on the basis of the geophysical survey, the site is assessed as of low archaeological potential, and low to moderate in the vicinity of the possible pits.