20 Apr 1991	First Round		Nuform Sports v Outcasts	Nuform Ground, Scunthorpe	misc
	28 Apr 1991	Preliminary Round	#	Grimsby British Rail Sports Association v Cleethorpes Third XI	Carr Lane, Grimsby	misc977607
	12 May 1991§	Preliminary Round		South Kelsey v Nettleton Mines	Lysaghts Sports Ground, Holton le Moor	misc
	27 May 1991	First Round		Broughton v Appleby Frodingham	Recreation Ground, Broughton	misc
	02 Jun 1991§	First Round		Alkborough v Normanby Park	West Halton Lane, Alkborough	misc
	02 Jun 1991§	First Round		Barton Town v Messingham	Marsh Lane, Barton on Humber	misc
	02 Jun 1991§	First Round		Belton v Nettleham	Church Street, Belton	misc
	02 Jun 1991§	First Round		Bracebridge Heath v Grimsby Town	Cross O'Cliff Court, Bracebridge Heath	misc
	02 Jun 1991§	First Round		Brigg Town v Haxey	Brigg Recreation Ground, Brigg	misc
	02 Jun 1991§	First Round		Caistor Town v Normanby Park Works	Brigg Road Ground, Caistor	misc
	02 Jun 1991§	First Round		Cleethorpes Third XI v Louth	Sports Ground, Cleethorpes	misc
	02 Jun 1991§	First Round		Hykeham v Saxilby	Memorial Field, North Hykeham	misc
	02 Jun 1991	First Round	#	Lincoln Claytons v Ross Sports	Clayton's Sports Club Ground, Lincoln	misc977704
	02 Jun 1991§	First Round		Market Rasen v Southcliffe St Andrews	Rase Park, Market Rasen	misc
	02 Jun 1991§	First Round		Nettleton Mines v Alford	Lysaghts Sports Ground, Holton le Moor	misc
	02 Jun 1991§	First Round		Rustons v Keelby	Newark Road, Lincoln	misc
	02 Jun 1991§	First Round		Scunthorpe Town v Kirton Lindsey	Heslam Park, Scunthorpe	misc
	02 Jun 1991§	First Round		Skegness v Hartsholme	Richmond Drive, Skegness	misc
	16 Jun 1991	Second Round	#	Alkborough v Keelby	West Halton Lane, Alkborough	misc977777
	23 Jun 1991§	Second Round		Alford v Normanby Park Works	Train Fen Holt, Alford	misc
	23 Jun 1991	Round One	#	Broughton v Appleby Frodingham	Recreation Ground, Broughton	misc887953
	23 Jun 1991§	Second Round		Hykeham v Appleby Frodingham	Memorial Field, North Hykeham	misc
	23 Jun 1991§	Second Round		Lincoln Claytons v not known	Clayton's Sports Club Ground, Lincoln	misc
	23 Jun 1991§	Second Round		Louth v Scunthorpe Town	London Road, Louth	misc
	23 Jun 1991§	Second Round		not known v not known	not known	misc
	23 Jun 1991§	Second Round		not known v not known	not known	misc
	23 Jun 1991	Second Round	#	Nuform Sports v Market Rasen	Nuform Ground, Scunthorpe	misc977784
	14 Jul 1991	Quarter-Final	#	Alkborough v Louth	West Halton Lane, Alkborough	misc977852
	14 Jul 1991§	Quarter-Final		Market Rasen v not known	Rase Park, Market Rasen	misc
	14 Jul 1991§	Quarter-Final		not known v Lincoln Claytons	not known	misc
	Aug 1991§	Quarter-Final		Normanby Park Works v Appleby Frodingham	Cemetery Road Sports Ground, Brumby	misc
	05 Aug 1991§	Semi-Final		Appleby Frodingham v Lincoln Claytons	Brumby Hall, Scunthorpe	misc
	05 Aug 1991§	Semi-Final		Louth v Market Rasen	London Road, Louth	misc
	18 Aug 1991	Final		Lincoln Claytons v Market Rasen	Augusta Street, Grimsby	misc977969

The scorecards marked with a # are potted scores only.

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