Thedwastre (also Thedwestry) was a hundred of the county of Suffolk, England covering an area of 40,362 acres (163.34 km2).
It is a fertile district with undulating terrain, and watered by streams which rise within its limits and feed the rivers Thet, Gipping, Lark and Brett.
[1] It is in the Deanery of Thedwestry, the Archdeaconry of Sudbury, the Diocese of Ely and Liberty of St Edmund.
It contains no town of any size, but Bury and Ixworth are on its borders.
Listed as Theivardestreu in the Domesday Book of 1086, the name derives from "Theodward's tree", presumably a notable tree where the Hundred Court used to meet in Thurston.