Roby is a village and electoral ward in the Metropolitan Borough of Knowsley, Merseyside, England.

Part of the wider built-up-area of Huyton-with-Roby with Huyton, Roby is effectively a dormitory village or suburb of the adjacent City of Liverpool.

[1] Historically in Lancashire, Roby was part of the hundred of West Derby, an ancient subdivision of Lancashire covering the south-west of the county, as a broadly rural village and township within the Parish of Huyton.

Roby grew from a tenth-century Norse settlement named Rabil, meaning "boundary farm/village".

It has a golf course situated in nearby Bowring Park by the M62 motorway and Roby Road.