Slough (/slaÊŠ/SLOW) is a town in Berkshire, England, in the Thames Valley, 20 miles (32Â km) west of central London and 19 miles (31Â km) north-east of Reading, at the intersection of the M4, M40 and M25 motorways. It is part of the historic county of Buckinghamshire. In 2021, the population of the town was 143,184. The wider Borough of Slough had a population of 158,500.
Slough's population is one of the most ethnically diverse in the United Kingdom, attracting people from across the country and the world for labour since the 1920s, which has helped shape it into a major trading centre. As of the 2021 UK census, 46.9% of the population was Asian, 35.9% White, 7.5% Black, 4% Mixed, 1.2% Arab and 4.5% of other ethnic heritage.