Bassetlaw is the northernmost district of Nottinghamshire, England, with a population according to the 2001 UK census of 107,713. The borough is predominantly rural, with two towns: Worksop, site of the borough offices, and Retford.
Other settlements in the borough include:
- Babworth, Beckingham, Bircotes, Blyth, Bole, Bothamsall
- Carburton, Carlton-in-Lindrick, Clarborough, Clayworth, Cuckney
- East Drayton, East Markham, Eaton, Elkesley, Everton
- Gamston, Gringley-on-the-Hill, Grove
- Harworth, Hayton, Headon
- Markham Moor, Mattersey, Milton, Misson, Misterton
- Normanton-on-Trent, North Leverton-with-Habblesthorpe, North Wheatley
- Rampton, Ranby, Ranskill, Rhodesia, Rockley
- Saundby, Scrooby, Shireoaks, South Leverton, Sutton cum Lound, Sturton le Steeple
- Torworth, Treswell, Tuxford
- West Drayton, West Markham, West Stockwith, Woodbeck
The district was formed on April 1, 1974 by the merger of the boroughs of Worksop and Retford and most of Worksop Rural District and most of Retford Rural District. It is named for the historic Bassetlaw wapentake of Nottinghamshire.