North Midlands 4 was a tier 10 English Rugby Union league with teams from Birmingham, Herefordshire, Shropshire and Worcestershire taking part. Promoted teams moved up to North Midlands 3 and there was no relegation. After five seasons North Midlands 4 was cancelled at the end of the 1991–92 campaign with teams transferred into either North Midlands 2 or North Midlands 3 depending on final league ranking.