Holyhead Admiralty Pier, Salt Island (Caergybi, Ynys Halen)
| Location | SH 25564 82904 / 53.3143, -4.6199 / status.tennis.dolly |
| Established / Rebuilt / Automated / Closed | 1821 / — / — / 1870s |
| Architect or Builder | John Rennie |
| Height of tower (m) / above sea level (m) | 15 / — |
| Owner | Stena Line |
The current lighthouse at the tip of Admiralty Pier replaced an earlier one that stood on Salt Island and was erected as part of a major development of Holyhead Harbour. It has a twin in the port of Howth at the other end of the Wales-Ireland packet ship route. The light fell into disuse in the 1870s when the inner harbour was redeveloped, although for many years it supported a pair of red and green lights on a pole that indicated if the inner harbour was open.