borough (district), administrative and historic county of Leicestershire, England. Both Oadby and Wigston, formerly villages lying outside the city of Leicester, have in recent years been engulfed by the outward spread of the city's suburbs. They lie to the southeast and south, respectively, of the city's centre. Oadby is almost entirely residential, while Wigston is both residential and industrial, lying close to canal, rail, and river routes. Area 9 square miles (24 square km). Pop. (2001) 55,794.