Middleton-in-Teesdale's a small market town in County Durham, in England. It's situated on the north side of Teesdale between Eggleston and Newbiggin, a few miles to the north west of Barnard Castle. Administration Middleton's administered by Durham County Council. It's part of the Bishop Auckland parliamentary constituency, which 's represented in parliament by Helen Goodman (Labour Party). It's in the North East England region, which serves as a constituency for the European Parliament. The l… (More on Middleton-in-teesdale)