The Zeppelin LZ 15 - Ersatz Z I was a German military rigid airship. It was first flown on 16 January 1913. The Ersatz Z I was destroyed in a forced landing on 19 March 1913.
| Name | Zeppelin LZ 15 |
| Other Name(s) | Ersatz Z I |
| Construction Number | LZ 15 |
| Class | H |
| Tactical Numbering | Ersatz Z I |
| Role | Military airship |
| National Origin | Germany |
| Decade | 1910s |
| First Flight | 16 January 1913 |
| Status | Destroyed in a forced landing on 19 March 1913. |