Woolsthorpe, also known as Woolsthorpe-by-Belvoir, is a small village in the English county of Lincolnshire, about 5 miles (8 kilometres) from the town of Grantham. It is right next to the border with the county of Leicestershire; the neighbouring village of Belvoir lies just the other side of the border.
It is not to be confused with the hamlet of Woolsthorpe-by-Colsterworth, the birthplace of Sir Isaac Newton, which is also in Lincolnshire but about 8 miles (13 km) to the south-east.