Monmouth Mynwy
Former County constituency for the House of Commons
Boundary of Monmouth Mynwy in Wales
Preserved county	Gwent
Electorate	65,432 (December 2010)[1]
Major settlements	Abergavenny, Chepstow, Monmouth
1918–2024
Seats	One
Created from	Monmouth Boroughs, North Monmouthshire and South Monmouthshire
Replaced by	Monmouthshire Torfaen
Senedd	Monmouth, South Wales East

Monmouth (Welsh: Mynwy) was a county constituency^{[n 1]} of the House of Commons of the Parliament of the United Kingdom (at Westminster). The seat was created for the 1918 general election. From 2005 until 2024 the Member of Parliament (MP) was David Davies of the Conservative Party.^{[n 2]}

The Monmouth Senedd constituency, created in 1999, has normally the same boundaries as the Westminster constituency. These cover a large area, omitting the mainly urban areas of Blaenau Gwent in the west and Newport, Wales in the south.

The constituency was abolished as part of the 2023 Periodic Review of Westminster constituencies and under the June 2023 final recommendations of the Boundary Commission for Wales for the 2024 United Kingdom general election. Its wards were split between Monmouthshire and Torfaen.^[2]

History

The constituency was considered a safe seat of the Conservative Party although the seat has been won by the Labour Party in three general elections – in addition to the 1991 by-election.

The last MP for Monmouth was the Conservative David Davies, elected in 2005 and a former member for the Senedd seat of the same name. To avoid confusion with the Yorkshire Conservative David Davis, he is named in Hansard as "David T. C. Davies".

Boundaries

Map of boundaries 1983-2024

1983 to 2024

The constituency was one of eight covering the preserved county of Gwent. The other seven were Blaenau Gwent, Caerphilly, Islwyn, Merthyr Tydfil and Rhymney, Newport East, Newport West and Torfaen. Merthyr Tydfil and Rhymney, however, straddles the boundary with the preserved county of Mid Glamorgan. It covered most of the local authority of Monmouthshire, with the main towns being Chepstow, Monmouth and Abergavenny.

For the 2010 general election, there were no changes to the boundaries of the Monmouth constituency stemming from the Fifth Review of the Boundary Commission for Wales.^[3] Likewise there were no boundary changes in 1997.

1918 to 1983

As first used in the 1918 general election, the constituency was a creation of the Representation of the People Act 1918 as one of six constituencies covering the county of Monmouth. Prior to the 1918 election the county had been covered, nominally, by the county constituencies of Northern Monmouthshire, Southern Monmouthshire, and Western Monmouthshire, and the Monmouth Boroughs borough constituency. By 1918, however, administrative county boundaries were out of alignment with constituency boundaries. The new constituency boundaries took account of the new local government boundaries.

The other Monmouthshire constituencies defined by the 1918 legislation were the county constituencies of Abertillery, Bedwellty, Ebbw Vale and Pontypool, and the borough constituency of Newport. This general pattern was maintained until 1983, nine years after the administrative county they were based on had been abolished, but there were some boundary changes during the 1918 to 1983 period.

In 1918 the Monmouth constituency was defined as consisting of the municipal boroughs of Abergavenny, and Monmouth, the urban districts of Caerleon, Chepstow, and Usk, the rural districts of Abergavenny, Chepstow, Magor, Monmouth, Cwmbran and Pontypool, and part of the rural district of St Mellons.^[4] The same boundaries were used for the general elections of 1922, 1923, 1924, 1929, 1931, 1935 and 1945.

New boundaries, created by the House of Commons (Redistribution of Seats) Act 1949, were used for the 1950 general election, and the Monmouth constituency was defined as consisting of the municipal boroughs of Abergavenny and Monmouth, the urban districts of Caerleon, Chepstow, Cwmbran and Usk, and the rural districts of Abergavenny, Chepstow, Magor and St Mellons, Monmouth, and Pontypool.^[4]

For the 1951 general election, there was some alteration to the boundaries of rural district of Magor and St Mellons.^[4]

The constituency was redefined again for the 1955 general election, taking account of new local government boundaries. The result was the same list of boroughs and districts as for the 1951 election.^[4] 1951 boundaries were used also in the general elections of 1959, 1964, 1966, 1970, February 1974, October 1974 and 1979.

In 1974, under the Local Government Act 1972, the local government county of Monmouth was abolished. For the 1983 general election, new constituency boundaries were drawn, taking account of new local government boundaries.

Members of Parliament

The following list does not include MPs who actually represented Monmouth Boroughs:

Elections

Elections in the 1910s

Elections in the 1920s

Elections in the 1930s