Blankney is a village and civil parish in the North Kesteven district of Lincolnshire, England. The population of the civil parish at the 2011 census was 251. The village is situated approximately 9 miles (14 km) south from the city and county town of Lincoln and 9 miles north from Sleaford. Blankney is a small stone-built estate village, built around the large estate of Blankney Hall. According to the 2001 Census, the population was 239.