Barrowby is a large village and civil parish in the South Kesteven district of Lincolnshire, England. It is situated west from Grantham town centre. It is noted for its position overlooking the Vale of Belvoir, and for its Grade I listed parish church of All Saints.
The 2001 census for Barrowby lists 795 households and a population of 1996.
The first written records for Barrowby are in the Domesday Book of 1086 in which the village is referred to as "Bergebi", thought to derive from Scandinavian languages 'berg-by' meaning 'village by the hill'. It is therefore assumed that the Vikings founded the village, although this remains unproven. The Domesday record shows that there was a church with a priest and of meadow. The church referred to in the Domesday Book was probably built of wood. The village belonged to the historical wapentake of Winnibriggs and Threo.
The Domesday village of Casthorpe is west from Barrowby. By the 14th century it was referred to in records as two holdings, East and West Casthorpe. It is now little more than a cluster of farm buildings. A further Deserted Medieval Village is Newbo, 1.5 miles to the north-west, which was located by archaeologists in 1970.