The Sri Lanka Navy 25th Anniversary Medal (Sinhala: ශ්රී ලංකා නාවික හමුදා 25වන සංවත්සර පදක්කම Śrī Laṃkā nāvika hamudā visipasvana sangwathsara padakkama) was awarded to all ranks of both the regular- and volunteer forces of the Sri Lanka Navy, as well as civilians employed within the Navy who have completed a minimum of ten years of service by any time point within the 9 December 1974 to 8 December 1975 period, the year of the 25th anniversary of the Navy.[1]
| Sri Lanka Navy 25th Anniversary Medal | |
|---|---|
 Medal, obverse | |
| Type | Anniversary medal |
| Awarded for | Service |
| Description | Suspended from a plain suspension bar |
| Presented by | Sri Lanka |
| Eligibility | All ranks of the Sri Lanka Navy, both regular or volunteer, and civilians |
| Clasps | None |
| Status | No longer awarded |
| Established | 1975 |
| First awarded | 1975 |
| Last awarded | 1975 |
 | |
| Precedence | |
| Next (higher) | Republic of Sri Lanka Armed Services Medal |
| Equivalent | Sri Lanka Army 25th Anniversary Medal Sri Lanka Air Force 25th Anniversary Medal |
| Next (lower) | Sri Lanka Army 50th Anniversary Medal Sri Lanka Navy 50th Anniversary Medal Sri Lanka Air Force 50th Anniversary Medal |