(Incomplete)
| Isotope | Abundance | T½ (s) | Decay |
| 48Co | | | |
| 50Co | | | |
| 51Co | | | |
| 52Co | | | |
| 53Co | | | |
| 54Co | | | |
| 55Co | | | |
| 56Co | | | |
| 57Co | | | |
| 58Co | | | |
| 59Co | 100 % | Stable | - |
| 60Co | | | |
| 61Co | | | |
| 62Co | | | |
| 63Co | | | |
| 64Co | | | |
| 65Co | | | |
| 66Co | | | |
| 67Co | | | |
| 68Co | | | |
| 69Co | | | |
| 70Co | | | |
| 72Co | | | |
| 73Co | | | |
| 74Co | | | |
| 75Co | | | |
| 76Co | | | |
| 77Co | | | |
| 78Co | | | |
Note: No 48Co isotope.
All data from [9].
| α: | alpha particle emission (4He nucleus) |
| β+: | emission of an anti-electron and a neutrino. A proton inside the nucleus is transformed into a neutron |
| β-: | emission of an electron and an anti-neutrino. A neutron inside the nucleus is transformed into a proton |
| ec: | electron capture: capture of one orbital electron by the the nucleus. A proton inside the nucleus is transformed into a neutron plus a neutrino |
| SF: | Spontaneous Fission: a nucleus spontaneously splits into fragment nuclides |
| IT: | Isomeric Transition: a level above the ground state decays via electromagnetic process |
| n: | neutron emission |
| p: | proton emission |
| β- n (and similar): | beta- decay followed by delayed neutron emission |
| 