BBC News Manchester
About 26% of people in the area needing transplants are black or Asian.
Only 2% of people from the two communities are on the national Organ Donation Register.
Jane Monks, an organ donation nurse, said a transplant is "much more likely to be successful" between donors and recipients of the same ethnic origin.
She said: "It is vital that more black and Asian people join the NHS Organ Donor Register.