The Royal Dockyard Museum is a naval museum, located along a dry-dock at the royal shipyard, within the compound of the Royal Thai Navy base in Thonburi.

It is housed in the former Directorate of Operations of the Naval Dockyard Department, a greyish-green two-storey edifice that was constructed over 100 years ago, in the reign of King Rama V.

Its full official name is Phiphithaphan Uh Reua Luang Chaleum Phra Kian 84 Phansa (พิพิธภัณฑ์อู่เรือหลวงเฉลิมพระเกียรติ ๘๔ พรรษา), i.e. ‘His Majesty The King's 84 Birthday Anniversary Royal Dockyard Museum’.