The Zeppelin LZ 9 or Ersatz Z II was a German military rigid airship. It was first flown on 2 October 1911. LZ 9 was decommissioned on 1 August 1914.
| Name | Zeppelin LZ 9 |
| Other Name(s) | Ersatz Z II |
| Construction Number | LZ 9 |
| Class | F |
| Tactical Numbering | Ersatz Z II |
| Role | Military airship |
| National Origin | Germany |
| First Flight | 2 October 1911 |
| Status | Decommissioned 1 August 1914 |