ROTHERHAM, rŏð'ėr-ạm, England, county borough in the West Riding of Yorkshire, at the confluence of the Rother and the Don, five miles northeast of Sheffield. The most notable buildings are the 14th century cruciform church, market hall, post office, courthouse, corporation buildings, mechanics' institute and free library. The town possesses extensive metal and railway carriage works, potteries, glass works and rope yards. It is of Roman origin and was of some importance in the Anglo Saxon period. Pop. 62,500.