Worcester is a city in Worcestershire, England, 31 miles (50 km) southwest of Birmingham, 101 miles (163 km) west-northwest of London, 27 miles (43 km) north of Gloucester and 23 miles (37 km) northeast of Hereford. The population is approximately 100,000. The River Severn flanks the western side of the city centre, which is overlooked by Worcester Cathedral.