League Membership 1893 -
2018

ClubJoinedResignedPromotedRelegated
Constable Burton18931895  
Ironopolis18931895  
Middlesbrough18931910  
Middlesbrough1919   
Northallerton18931897  
Northallerton1971  2011
Redcar1893  1998
Redcar  20002008
Redcar  20122015
Thirsk18931896  
Thornaby1894  1997
Thornaby  20002003
Thornaby  20082010
Thornaby  20112013
Thornaby  2017 
Guisborough1895  2017
Darlington1896   
Stockton18961999  
North Ormesby18961914  
Norton18981999  
Norton  20142017
Hartlepool1899   
Saltburn19051940  
Saltburn1945  2007
Saltburn  20122014
Bishop Auckland19061941  
Bishop Auckland1946  2001
Bishop Auckland  20022011
Bishop Auckland  2017 
Darlington RA1919  2006
Normanby Hall1921  2013
Normanby Hall  20142016
Blackhall1933  2004
Blackhall  20062009
Billingham Synthonia19331993  
Billingham Synthonia  20042005
Billingham Synthonia  20072012
Billingham Synthonia  20152016
Great Ayton19401940  
Great Ayton  2003 
Marton19401940  
Marton  20052015
Marton  2016 
Preston19401942  
Yarm19401942  
Summersons19451945  
Marske1971  2012
Marske  2013 
Wolviston  20012002
Richmondshire1994  1997
Richmondshire  1998 
Stokesley  2009 
Barnard Castle  2010 
Sedgefield  20112014
Seaton Carew  2013 

Current Members
ClubMember Since
Darlington1896
Hartlepool1899
Middlesbrough1919
Richmondshire1998
Great Ayton2003
Stokesley2009
Barnard Castle2010
Seaton Carew2013
Marske2013
Marton2016
Bishop Auckland2017
Thornaby2017

  North Ormesby CC amalgamated with Middlesbrough CC in 1916, upon the resumption of cricket after the Great War, the latter appear in place of the former.

Saltburn withdrew from the league in 1940 as it was a restricted area during World War Two.

Preston and Yarm competed in 'A' Division in season 1940 & 1942.

West Hartlepool changed their name to Hartlepool in 1968.

Promotion and Relegation also started from the 1998 season.