The Cork Junior B Hurling Championship is a hurling competition played by Gaelic Athletic Association clubs in Cork. This is the fourth and lowest tier of county hurling competitions organized by Cork. The competition is confined to clubs who play solely at this level. Thus the second and third teams of clubs playing at a higher level are ineligible for the county title. The clubs have to win championships in one of the eight GAA divisions in the county to qualify for this competition.
| Year | Winner | Opponent |
|---|---|---|
| 2011 | Kilmichael 1-18 | Ballinacurra 1-08 |
| 2010 | Doneraile 2-08 | Rathpeacon 1-09 |
| 2009 | Ballinacurra 4-12 | Randal Og 1-20 |
| 2008 | Lisgoold 2-19 | St. Mary's 1-07 |
| 2007 | St. Ita's * 0-12 | Castlemagner 0-07 |
| 2006 | Dohenys 0-09 | Killavullen 0-06 |
| 2005 | St. James 2-06 | Lough Rovers 0-07 |
| 2004 | O'Donovan Rossa 3-17 | Lismire 1-07 |
| 2003 | St. Colum's 3-11 | Lisgoold 1-12 |
| 2002 | St. Oliver Plunkett's 0-11 | Kilshannig 0-10 |
| 2001 | Harbour Rovers 3-08 | St. Mary's 2-04 |
| 2000 | Randal Og 0-10 | Lisgoold 0-06 |
| 1999 | Araglen 1-11 | St. Oliver Plunkett's 0-10 |
| 1998 | Castletownroche 2-12 | Ballyhooley 0-05 |
| 1997 | Carrignavar 1-10 | Kilshannig 0-07 |
| 1996 | Awbeg Rangers 1-11 | Dohenys 0-05 |
| 1995 | Ballyhooley 2-14 | Tullylease 0-07 |
| 1994 | Lisgoold 3-06 | Awbeg Rangers 0-11 |
| 1993 | Ballygiblin 4-12 | Belgooly 1-12 |
| 1992 | Randal Og 3-16 | Tullylease 2-03 |
| 1991 | Castlelyons 2-07 | Whites Cross 1-04 |
| 1990 | Harbour Rovers 0-12 | Rathpeacon 0-08 |
| 1989 | Gabriel Rangers 3-07 | Awbeg Rangers 0-11 |
| 1988 | Kilshannig 0-10 | Whitechurch 0-01 |
| 1987 | Liscarroll 2-08 | Randal Og 1-07 |
| 1986 | Iveleary 0-07 | St. Mary's 1-01 |
| 1985 | Ballyhooley 4-08 | Dromtarriffe 0-01 |
| 1984 | Kilbree 4-03 | Kilshannig 3-05 |