Plympton is a suburb of the city of Plymouth in Devon, England. It is in origin an ancient stannary town. It was an important trading centre for locally mined tin, and a seaport before the River Plym silted up and trade moved down river to Plymouth and was the seat of Plympton Priory the most significant local landholder for many centuries. Plympton is an amalgamation of several villages, including St Mary's, St Maurice, Colebrook, Woodford, Newnham, Langage and Chaddlewood.