May 1980§	First Round		Immingham British Rail Sports Association Second XI v Messingham Second XI	Blossom Way, Immingham	misc
	May 1980§	First Round		Normanby Park Works Third XI v Barton Town Second XI	Cemetery Road Sports Ground, Brumby	misc
	25 May 1980	Round One		Broughton Second XI v Alkborough Second XI	Recreation Ground, Broughton	misc860203
	Jun 1980§	Quarter-Final		Broughton Second XI v Grimsby British Rail Sports Association Second XI	Recreation Ground, Broughton	misc
	Jun 1980§	Quarter-Final		East Halton Second XI v Brigg Town	Townside Farm, East Halton	misc
	Jun 1980§	Quarter-Final		Normanby Park Works Third XI v Winteringham	Cemetery Road Sports Ground, Brumby	misc
	Jun 1980§	Quarter-Final		Scunthorpe Town Third XI v Messingham Second XI	Co-operative Sports Ground, Scunthorpe	misc
	Jul 1980§	Semi-Final		Messingham Second XI v Brigg Town Second XI	Memorial Playing Field, Messingham	misc
	26 Jul 1980	Semi-Final		Broughton Second XI v Normanby Park Works Third XI	Recreation Ground, Broughton	misc860213
	Aug 1980§	Final		Normanby Park Works Third XI v Messingham Second XI	Cemetery Road Sports Ground, Brumby	misc

§ The fixture list specified that the match must be completed by this date.