Two ships of the Royal Australian Navy have been named HMAS Diamantina, after the Diamantina River in Queensland.
- HMAS Diamantina (K377), a River-class frigate commissioned in 1945, decommissioned in 1980, and preserved as a museum ship
- HMAS Diamantina (M 86), a Huon-class minehunter, commissioned in 2001 and active as of 2016
A single battle honour was earned by the frigate HMAS Diamantina, and is inherited by all subsequent ships of the name:
- Pacific 1945
- "Navy Marks 109th Birthday With Historic Changes To Battle Honours". Royal Australian Navy. 1 March 2010. Archived from the original on 13 June 2011. Retrieved 23 December 2012.
- "Royal Australian Navy Ship/Unit Battle Honours" (PDF). Royal Australian Navy. 1 March 2010. Archived from the original (PDF) on 14 June 2011. Retrieved 23 December 2012.