District of Monmouth
|- 1971||64,400|
|- 1991||76,000|
|- Succeeded by||Monmouthshire|
The Monmouth district (Welsh: Trefynwy) was one of five districts of Gwent in Wales between 1974 and 1996. In 1988 the district was granted a charter conferring borough status, becoming the Borough of Monmouth (although this should not be confused with the historic municipal borough of Monmouth).
- The municipal boroughs of Abergavenny and Monmouth,
- The urban districts of Chepstow and Usk
- The rural districts of Abergavenny, Chepstow, Monmouth and part of Pontypool Rural District.
The headquarters of the district council was Mamhilad House, Pontypool. This had previously been the administrative centre of Pontypool Rural District, and was in the neighbouring district of Torfaen.
The Parliamentary constituency of Monmouth covers roughly the same area.