Gainsthorpe is a deserted medieval village (DMV) site in a field which is part of the present Gainsthorpe Farm in Lincolnshire, England. The site is in Hibaldstow parish located on a minor road west of the A15 road, south of Hibaldstow and 5 miles south-west of Brigg.
It is now in the care of English Heritage. There is a small car park from where a footpath of about two hundred metres leads to the site. The typical medieval layout of sunken roads and raised rectangular tofts and crofts is clearly seen in the humps and hollows of the field.