The National Maritime Museum of Ireland (Irish: Músaem Mhuirí Náisiúnta na hÉireann) opened in 1978 in the former Mariners' Church in Moran Park, located between the seafront and the centre of Dún Laoghaire town, southeast of Dublin city.

President Michael D. Higgins officially re-opened the museum in 2012.

The church was built in 1837 for seafarers and remained open until 1971.

It is operated by volunteers and a community employment scheme provided by the Department of Social Protection.

[2] In July 2011 two stained-glass windows by artist Peadar Lamb were installed in the former church, sponsored by the Dún Laoghaire Harbour Company.