| 1951 Cork Junior Hurling Championship | |
| Teams: | 7 |
| Dates: | 16 September - 28 October 1951 |
| Champions: | Castlemartyr |
| Count: | 1 |
| Champions Captain: | Paddy Abernethy |
| Runners-Up: | Cloughduv |
| Runners-Up Captain: | Dan O'Connor |
| Matches: | 6 |
| Goals: | 56 |
| Points: | 41 |
| Previous Year: | 1950 |
| Previous Tournament: | 1950 Cork Junior Hurling Championship |
| Next Year: | 1952 |
| Next Tournament: | 1952 Cork Junior Hurling Championship |
The 1951 Cork Junior Hurling Championship was the 54th staging of the Cork Junior Hurling Championship since its establishment by the Cork County Board.
On 28 October 1951, Castlemartyr won the championship following a 6-05 to 2-07 defeat of Cloughduv in the final at the Cork Athletic Grounds.[1] [2] This was their first ever championship title.[3] [4]