1983–1997: The Borough of Erewash wards of Breaston, Cotmanhay, Dale Abbey, Derby Road East, Derby Road West, Draycott, Ilkeston Central, Ilkeston North, Ilkeston South, Kirk Hallam North, Kirk Hallam South, Long Eaton Central, Nottingham Road, Ockbrook and Borrowash, Old Park, Sandiacre North, Sandiacre South, Sawley, Victoria, West Hallam, and Wilsthorpe.
1997–2010: The Borough of Erewash wards of Abbotsford, Breaston, Cotmanhay, Dale Abbey, Derby Road East, Derby Road West, Draycott, Ilkeston Central, Ilkeston North, Ilkeston South, Kirk Hallam North, Kirk Hallam South, Long Eaton Central, Nottingham Road, Ockbrook and Borrowash, Old Park, Sandiacre North, Sandiacre South, Sawley, Victoria, West Hallam, and Wilsthorpe.
2010–2015: The Borough of Erewash wards of Abbotsford, Breaston, Cotmanhay, Derby Road East, Derby Road West, Draycott, Hallam Fields, Ilkeston Central, Ilkeston North, Kirk Hallam, Little Hallam, Long Eaton Central, Nottingham Road, Old Park, Sandiacre North, Sandiacre South, Sawley, and Wilsthorpe.
Further to their review of parliamentary representation in Derbyshire which became effective for the 2010 general election, the Boundary Commission for England created a Mid Derbyshire constituency. This took electoral wards from the existing Erewash seat, as well as making some minor alterations in neighbouring constituencies.
2015–present: Further to a local government boundary review which became effective in May 2015,[3] the constituency now comprises the following wards of the Borough of Erewash:
The constituency covers most of the borough of Erewash, between the cities of Derby and Nottingham. The largest towns in the constituency are Long Eaton and Ilkeston. The constituency has returned a ruling-party MP since its creation. As an area which is neither especially wealthy nor especially poor, Erewash is described by political commentators as a "key marginal seat" in general elections.[citation needed]
On 30 June 2024, Liam Booth-Isherwood disowned the Reform UK party and endorsed the Conservatives, following what he described as "reports of widespread racism and sexism" within Reform UK.[8]