Rawtenstall (/ˈrɒtənstɔːl/) is a town in the borough of Rossendale, Lancashire, England. The town lies 15 miles (24 km) north of Manchester, 22 miles (35 km) east of Preston and 45 miles (70 km) south east of Lancaster. The town is at the centre of the Rossendale Valley. As of 2022, it had a population of 23,000.

The name Rawtenstall has been given two possible interpretations. The older is a combination of the Middle English routen ('to roar or bellow'), from the Old Norse rauta and the Old English stall 'pool in a river' (Ekwall 1922, 92). The second, more recent one, relates to Rawtenstall's identification as a cattle farm in 1324 and combines the Old English ruh 'rough' and tun-stall 'the site of a farm or cow-pasture', or possibly, 'buildings occupied when cattle were pastured on high ground'

The earliest settlement at Rawtenstall was probably in the early Middle Ages, during the time when it formed part of the Rossendale Valley in the Honour of Clitheroe, and consisted of simple dwellings for forest servants and animals. More substantial buildings may have followed in the 15th and 16th centuries with corn and flour mills.

The town entered a major period of growth during the Industrial Revolution, as new mills were constructed to process cotton. The climate and weather were conducive to the industry, as was the town's nearby location to the rapidly developing industrial and mercantile centre at Manchester, dubbed 'Cottonopolis'. Only a few of these mills survive today, and none are operational anymore. During this period, the brothers Thomas, David and Peter Whitehead became important entrepreneurs in the town. They built a number of mills, including one of the earliest mills in the valley, at Lower Mill, and the still existing Ilex Mill. They also built substantial houses for themselves at Holly Mount, as well as large numbers of terraced houses for their workers. Other industries active in this period included quarrying and small scale coal mining, as well as an expanding commercial sector.

As with many mid-Lancashire towns, it saw a population decline in the 20th century, going from 30,000 inhabitants in the 1911 census to 21,500 in the 1971 census. With the decline of the traditional manufacturing industries, shoemaking became one of the last survivors. this was usually known locally as the slipper industry, since slipper-making grew from the local processing of felt, which itself grew from the textile industry. The firm of H. W. Tricketts, in nearby Waterfoot, had been a major producer and exporter of footwear across the British Empire, but shoemaking declined rapidly from the 1980s. Firms closed as production moved overseas, and the remaining companies are largely importers.

The church of St Nicholas (Church of England) is at Newchurch (rebuilt 1825) as is the Roman Catholic church of St Peter (1892). Other churches are St Michael's Lumb, St James's Waterfoot, St Anne's Edgeside, St John's Cloughfold, St Mary's Oakenhead, St John the Evangelist's Crawshawbooth, St Mary and All Saints Goodshaw (rebuilt 1790). Another RC church (dedicated to St James the Less) is at Oakenhead and there are a number of Nonconformist chapels.

A local board was formed for the town in 1874 and the district it governed was extended to cover parts of the townships of Lower Booths (Rawtenstall itself), Higher Booths, Newchurch and Haslingden in the ancient parish of Whalley and Cowpe, Lench, Newhall Hey and Hall Carr, and part of Tottington (Higher End) in the ancient parish of Bury. Rawtenstall Town Hall was completed in 1876. Subsequently, Rawtenstall was incorporated as a municipal borough in 1891 and in 1894 a civil parish was created to match the borders of the borough. Following the local government reorganisation in 1974 Rawtenstall became part of the Borough of Rossendale.

Rawtenstall is part of the Rossendale and Darwen constituency, after the constituency of Rossendale was abolished in 1983. The constituency sends one member of parliament to the House of Commons.