Oadby is a town in the borough of Oadby and Wigston in Leicestershire, England. Oadby is a district centre 4 miles (6.4 km) south-east of Leicester on the A6 road. Leicester Racecourse is situated on the border between Oadby and Stoneygate. The University of Leicester Botanical Garden is in Oadby. Oadby had a population of 23,849 in 2011, and like its neighbour Wigston is made up of five wards. The Borough of Oadby and Wigston is twinned with Maromme in France, and Norderstedt in Germany.

Oadby and Wigston is a local government district with borough status in Leicestershire, England. It covers the two towns of Oadby, where the council is based, and Wigston, which is the larger town. Both form part of the Leicester urban area, lying south-east of the city.