16 cities
| City | 2025 Pop. ↓ |
|---|---|
| Ingolstadt | 132,438 |
| Iserlohn | 97,910 |
| Ibbenbueren | 50,577 |
| Itzehoe | 33,047 |
| Idar-Oberstein | 31,610 |
| Ilmenau | 27,055 |
| Idstein | 22,810 |
| Isernhagen Farster Bauerschaft | 22,601 |
| Illingen | 18,488 |
| Illertissen | 16,522 |
| Ismaning | 14,596 |
| Immenstadt im Allgau | 14,431 |
| Isny im Allgau | 14,424 |
| Issum | 12,249 |
| Ilsede | 12,241 |
| Isselburg | 11,239 |