Dyke is a village in the South Kesteven district of Lincolnshire, England. It is situated less than 1 mile (1.6 km) east from the A15 road, and approximately 1 mile north-east from Bourne. Dyke is within Bourne civil parish.
The name Dyke arises from its lying on Car Dyke, a once much larger Roman ditch, which runs along the western edge of The Fens. The section of Car Dyke between Dyke and Bourne is a scheduled ancient monument.
For population statistics Dyke, Twenty, South Fen, and Spalding road outside Bourne are taken together; Dyke is the largest of these settlements. The 2001 census recorded a population of 1,598, falling to 1,541 at the 2011 census.
Dyke and Dyke Fen fall within the drainage area of the Black Sluice Internal Drainage Board.
A new fountain was built on the green in the centre of the village to mark the millennium.
Dyke's public house is The Wishing Well Inn.