Greylees is a residential area near Sleaford[1][2] in the North Kesteven district of the ceremonial county of Lincolnshire, England.

[1] Robert de Vessey was a landowner in Lincolnshire recorded in the Domesday Book, with a castle at Caythorpe.

[6] The suburb has no dedicated high street or amenities, the nearest retail and employment centre being both Sleaford and Grantham.

The area does have a petrol station on the Grantham - Sleaford road and also a tea room, "The New Chapel" and the nearest public houses are both "The Horseshoes" in Silk Willoughby and "The Bustard Inn & Restaurant" in South Rauceby.

The suburb is directly southeast of Rauceby railway station on the Poacher Line between Skegness and Grantham with links to Sleaford, Boston and Wainfleet All Saints.