Polstead is a small village and civil parish in the Babergh District of Suffolk, England. The village lies 3 miles (4.8 km) northeast of Nayland, 5 miles (8 km) southwest of Hadleigh and 9 miles (14 km) north of Colchester. It is situated on a small tributary stream of the River Stour.
The village is noted for being the site of the Red Barn Murder in 1827. The victim Maria Marten, once found, was re-buried in the churchyard of St Mary's Church, but her gravestone was eventually chipped away to nothing by souvenir hunters.