The Metropolitan Borough of Tameside is a metropolitan borough of Greater Manchester in England. It is named after the River Tame, which flows through the borough, and covers the towns of Ashton-under-Lyne, Audenshaw, Denton, Droylsden, Dukinfield, Hyde, Mossley and Stalybridge. Tameside is bordered by the metropolitan boroughs of Stockport to the south, the Oldham to the north and northeast, Manchester to the west, and to the east by the Borough of High Peak in Derbyshire. the overall population was 219,324. It is also the 8th-most populous borough of Greater Manchester by population.
The history of the area extends back to the Stone Age. There are over 300 listed buildings in Tameside and three Scheduled Ancient Monuments, which includes a castle of national importance. The settlements in Tameside were townships centred on agriculture until the advent of the Industrial Revolution. The towns of the borough grew and became involved in the cotton industry, which grew and expanded the local economy. The current borough was created in 1974 as part of the provisions of the Local Government Act 1972.
The history of the area stretches back up to 10,000 years; there are 22 Mesolithic sites in Tameside, the oldest dating to around 8000 BC; 21 of the 22 sites are in the hilly uplands in the north east of the borough. Evidence of Neolithic and Bronze Age activity is more limited in the borough, although the Bronze Age Stalybridge Cairn is the most complete prehistoric funerary monument in the borough. The people in the area changed from hunter-gatherers to farmers around 2500 BC–1500 BC due to climate change. Werneth Low is the most likely Iron Age farmstead site in the borough, probably dating to the late 1st millennium BC. Before the Roman conquest of Britain in the 1st century AD, the area was probably part of the territory of the Brigantes, the Celtic tribe controlling most of what is now north west England.
The area came under control of the Roman Empire in the second half of the 1st century.