Sulby is a hamlet and civil parish in West Northamptonshire in England.

The population of the hamlet at the 2011 Census is included in the civil parish of Sibbertoft.

The hamlet's name means 'farm/settlement of Sula', 'farm/settlement with a post' or 'farm/settlement in a gully'.

[1] Sulby Reservoir lies to the south of the settlement.

[3] Media related to Sulby, Northamptonshire at Wikimedia Commons