| Imperial Service Medal | |
|---|---|
  Obverse and reverse of the medal | |
| Awarded for | 25 years of meritorious service |
| Presented by |  Charles III |
| Eligibility | Civil Servants of the United Kingdom, the Dominions, Colonies, Protectorates, and Overseas Territories. |
| Post-nominals | ISM |
| Established | 8 August 1902[1] |
| Last awarded | 2024 Special Honours |
 Ribbon bar of the medal | |
| Order of Wear | |
| Next (higher) | Polar Medal[2] |
| Next (lower) | Indian Police Medal[2] |
Original design, Gentlemen's and ladies' issues
The Imperial Service Medal is a medal affiliated with the Imperial Service Order. The medal was established under the statutes of the Imperial Service Order, on 8 August 1902, by King Edward VII,[1] with the first awards appearing in the London Gazette in May 1903.[3] Recipients of this order are entitled to use the post-nominal letters 'ISM'.
- ^ a b "No. 27463". The London Gazette. 8 August 1902. p. 5171.
- ^ a b "No. 56878". The London Gazette (Supplement). 17 March 2003. p. 3352.
- ^ "No. 27559". The London Gazette (Supplement). 29 May 1903. p. 3521.