Swayfield is a village and civil parish in the South Kesteven district of Lincolnshire, England. The population of the civil parish at the 2011 census was 316. It is situated just over 3 mi east from the A1 road, 9 mi south-east from Grantham and 10 mi north from Stamford. It has approximately 138 houses.
Swayfield has more than 316 people in 2019