Austerfield is a village and civil parish in the Metropolitan Borough of Doncaster, South Yorkshire, England. It is 1 mile (1.6 km) to the north-east of the market town of Bawtry on the A614 road, and adjacent to the hamlet of Newington in Nottinghamshire, close to the River Idle. The population in 2001 was 571, which fell to 536 at the 2011 Census.