Notts, Lincs & Derbyshire 4 was a tier 13 English Rugby Union league with teams from Nottinghamshire, Lincolnshire and Derbyshire taking part. Promoted teams moved up to Notts, Lincs & Derbyshire 3 and since the cancellation of Notts, Lincs & Derbyshire 5 at the end of the 1991–92 season there was no relegation. Notts, Lincs & Derbyshire 4 was cancelled at the end of the 1995–96 campaign and the majority of teams transferred into Notts, Lincs & Derbyshire 3.