Grantham is a market town within the South Kesteven district of Lincolnshire, England. It bestrides the London to Edinburgh East Coast Main Line railway and the River Witham, and lies close to the A1 main north-south road.
Grantham is located approximately 26 miles (42 km) south of the city of Lincoln, and approximately 24 miles (39 km) east of the city of Nottingham. The resident population at the 2001 census was 34,592 in around 18,000 households, excluding the adjacent village of Great Gonerby. With the housing estates in Londonthorpe and Harrowby Without (around a population of 4,500), this figure would be around 42,000.
The town is best known as the birthplace of former prime minister Margaret Thatcher, and the place where Isaac Newton went to school. It is close to an ancient Roman road, and was the scene of Oliver Cromwell's first advantage over Royalists during the English Civil War at Gonerby Moor. Grantham is also notable for having the first female police officers in the United Kingdom, in 1914, and producing the first running diesel engine in 1892, and the UK's first tractor in 1896.