1885–1918 • The Municipal Borough of St Albans; • The Sessional Divisions of Barnet and St Albans; and • Parts of the Sessional Divisions of Watford, Hertford and Dacorum. As well from the Borough of
St Albans, the seat included the towns of
Harpenden,
Hatfield and
Chipping Barnet.
1918–1945 • The Municipal Borough of St Albans; • The Urban Districts of Barnet and East Barnet Valley; • The Rural Districts of Barnet and Hatfield; and • The Rural District of St Albans civil parishes of Sandridge Rural, St Michael Rural, St Peter Rural, and St Stephen.
North-western parts, including Harpenden, transferred to the new Hemel Hempstead Division. South-western corner (Aldenham) transferred to Watford. 1945–1950 • The Municipal Borough of St Albans; • The Urban District of Welwyn Garden City; • The Rural District of Hatfield; and • The Rural District of St Albans civil parishes of Sandridge Rural, St Michael Rural, St Peter Rural, and St Stephen.
The Urban Districts of Barnet and East Barnet (formerly East Barnet Valley) and the Rural District of Elstree (formerly Barnet) formed the new Barnet Division. The Urban District of Welwyn Garden City had been formed as a separate local authority which had previously been partly in the Hitchin Division. Other marginal changes as a result of changes to local authority boundaries. 1950–1955 • The Municipal Borough of St Albans; • The Urban District of Welwyn Garden City; • The Rural District of Welwyn; and • The Rural District of St Albans civil parishes of Sandridge Rural, St Michael Rural, St Peter Rural, St Stephen, and Wheathampstead.
The Rural District of Welwyn was transferred from Hitchin and the parish of Wheathampstead from Hemel Hempstead. The Rural District of Hatfield was transferred to Barnet. 1955–1974 • The Municipal Borough of St Albans; and • The Rural District of St Albans civil parishes of Colney Heath, London Colney, Sandridge Rural, St Michael Rural, St Stephen, and Wheathampstead.
The Urban District of Welwyn Garden City and the Rural District of Welwyn were transferred to Hertford. (The parish of St Peter Rural had been divided into the parishes of Colney Heath and London Colney). 1974–1983 • The Municipal Borough of St Albans; • The Urban District of Harpenden; and • The Rural District of St Albans civil parishes of Harpenden Rural, Redbourn, St Michael Rural, Sandridge, and Wheathampstead.
Boundaries moved northwards: Harpenden U.D. and the parishes of Harpenden Rural and Redbourn were transferred in from Hemel Hempstead. The parishes of Colney Heath, London Colney and St Stephen were transferred out to form part of the new constituency of South Hertfordshire. 1983–1997 • The District of St Albans wards of Ashley, Batchwood, Clarence, Colney Heath, Cunningham, Harpenden East, Harpenden North, Harpenden South, Harpenden West, Marshalswick North, Marshalswick South, Redbourn, St Peter's, Sandridge, Sopwell, and Verulam.
Minor changes: Colney Heath transferred from abolished South Hertfordshire; Wheathampstead transferred to Welwyn Hatfield. 1997–2010 • The District of St Albans wards of Ashley, Batchwood, Clarence, Colney Heath, Cunningham, London Colney, Marshalswick North, Marshalswick South, Park Street, St Peter's, St Stephen's, Sopwell, and Verulam; and • The District of Three Rivers ward of Bedmond. ''Moved southwards again, gaining London Colney from
Hertsmere,
Park Street and St Stephen's from
Watford and the
Three Rivers District ward of
Bedmond from
South West Hertfordshire. Northern parts, including Harpenden, formed part of the new constituency of
Hitchin and Harpenden.''
2010–2024 • The
City of St Albans wards of Ashley, Batchwood, Clarence,
Colney Heath, Cunningham,
London Colney, Marshalswick North, Marshalswick South,
Park Street, St Peter's, St Stephen, Sopwell, and Verulam; and • The
Three Rivers District ward of
Bedmond and Primrose Hill.
Marginal adjustments to bring the parliamentary boundaries in line with those of local government wards, which had changed since the 1995 review. Current Further to the
2023 Periodic Review of Westminster constituencies, which came into effect for the
2024 general election, the composition of the constituency was unchanged except for the small part in the District of Three Rivers, which was transferred to
South West Hertfordshire. Following a local government boundary review which came into effect in May 2022, the constituency now comprises the following wards of the City of St Albans from the 2024 general election: • Batchwood; Bernards Heath; Clarence; Colney Heath; Cunningham; Hill End; London Colney; Marshalswick East & Jersey Farm (majority); Marshalswick West (nearly all); Park Street; St Peters; St Stephen (nearly all); Sopwell; Verulam (nearly all). The seat is in
Hertfordshire,
England. Specifically, it comprises the
cathedral city of
St Albans and some of the surrounding countryside, mainly to the south of the city. Neighbouring seats, clockwise from north, are:
Harpenden and Berkhamsted,
Welwyn Hatfield,
Hertsmere,
South West Hertfordshire. == Members of Parliament ==