Tattershall is a village and civil parish in the East Lindsey district of Lincolnshire, England. It is situated on the A153 Horncastle to Sleaford road, east from the point where that road crosses the River Witham. At its eastern end, Tattershall adjoins the village of Coningsby, with the two being separated by the River Bain. In the same parish is the hamlet of Tattershall Thorpe.
The 2011 census recorded a Tattershall civil parish population as 2,834, with the combined Tattershall and Coningsby area having a population of 6,698.