Billinghay is a village and civil parish in the North Kesteven district of Lincolnshire, England. The village is situated approximately 7 miles (11 km) north-east from Sleaford, and lies on the B1189 Walcott road near its junction with the A153. Just south of the village towards Sleaford is North Kyme. According to the 2001 census the parish had a population of 1,808.