Billingham is a town and civil parish in County Durham, England. The town is on the north side of the River Tees and is governed as part of the Borough of Stockton-on-Tees unitary authority. It had a population of 35,165 in the 2011 Census. The settlement has been around since Anglo-Saxon times as a village, a post-Second World War modern town centre was built north of the old village centre on the town's grange.