Tansor is a village and civil parish in the English county of Northamptonshire. Lying near the River Nene, three miles north-east of the town of Oundle and a mile from the village of Cotterstock, Tansor forms part of the district of East Northamptonshire. At the time of the 2001 census, the parish's population was 185 people, reducing to 172 at the 2011 Census. A notable son of Tansor was the naturalist and writer Horace William Wheelwright, born there in 1815. Attractions are limited; only a church, telephone and phone box and a village hall containing a playgroup.