| Isotope | Half-life | Spin Parity | Decay Mode(s) or Abundance |
|---|---|---|---|
| 58Ge | 0+ | ||
| 59Ge | |||
| 60Ge | |||
| 61Ge | 40 ms | (3/2-) | %EC+%B+=100, %ECP ~ 80 |
| 62Ge | 0+ | %EC+%B+=100 | |
| 63Ge | 95 ms | %EC+%B+=100 | |
| 64Ge | 63.7 s | 0+ | %EC+%B+=100 |
| 65Ge | 30.9 s | (3/2)- | %EC+%B+=100, %ECP=0.011 3 |
| 66Ge | 2.26 h | 0+ | %EC+%B+=100 |
| 67Ge | 18.9 m | 1/2- | %EC+%B+=100 |
| 68Ge | 270.8 d | 0+ | %EC=100 |
| 69Ge | 39.05 h | 5/2- | %EC+%B+=100 |
| 70Ge | stable | 0+ | %Abundance=21.23 4 |
| 71Ge | 11.43 d | 1/2- | %EC=100 |
| 71m1Ge | 20.40 ms | 9/2+ | %IT=100 |
| 72Ge | stable | 0+ | %Abundance=27.66 3 |
| 73Ge | stable | 9/2+ | %Abundance=7.73 1 |
| 73m1Ge | 0.499 s | 1/2- | %IT=100 |
| 74Ge | stable | 0+ | %Abundance=35.94 2 |
| 75Ge | 82.78 m | 1/2- | %B-=100 |
| 75m1Ge | 47.7 s | 7/2+ | %IT=99.970 6, %B-=0.030 6 |
| 76Ge | stable | 0+ | %Abundance=7.44 2 |
| 77Ge | 11.30 h | 7/2+ | %B-=100 |
| 77m1Ge | 52.9 s | 1/2- | %B-=81 2, %IT=19 2 |
| 78Ge | 88.0 m | 0+ | %B-=100 |
| 79Ge | 18.98 s | (1/2)- | %B-=100 |
| 79m1Ge | 39.0 s | (7/2+) | %B-=96 1, %IT=4 1 |
| 80Ge | 29.5 s | 0+ | %B-=100 |
| 81Ge | 7.6 s | (9/2+) | %B-=100 |
| 81m1Ge | 7.6 s | (1/2+) | %B-=100 |
| 82Ge | 4.60 s | 0+ | %B-=100 |
| 83Ge | 1.85 s | (5/2+) | %B-=100 |
| 84Ge | 947 ms | 0+ | %B-=100, %B-N=10.8 6 |
| 85Ge | 535 ms | %B-=100, %B-N=14 3 | |
| 86Ge | 0+ | ||
| 87Ge | (5/2+) | %B-=? | |
| 88Ge | 0+ | %B-=? | |
| 89Ge | (1/2+) | %B-=? |