| City | 2026 Pop. ↓ |
|---|---|
| Ingolstadt | 146,065 |
| Iserlohn | 91,681 |
| Ibbenbueren | 53,016 |
| Ilmenau | 39,096 |
| Ingelheim am Rhein | 35,280 |
| Itzehoe | 33,201 |
| Idar-Oberstein | 30,593 |
| Idstein | 25,852 |
| Isernhagen | 23,857 |
| Ilsede | 21,302 |
| Illertissen | 19,094 |
| Ismaning | 18,596 |
| Illingen | 15,912 |
| Isny im Allgaeu | 15,797 |
| Immenstadt i. Allgaeu | 15,049 |
| Issum | 12,627 |
| Ihlow | 12,415 |
| Isselburg | 11,461 |