Beachmaster or beach master may refer to:
- A military officer in charge of the disembarkation phase of amphibious warfare
- One of two US Navy amphibious beach party units:
- Beachmaster Unit One, based in Coronado, California
- Beachmaster Unit Two, based in Little Creek, Virginia
- A dominant male of some pinniped species, most often an elephant seal
In literature:
- Beachmasters, a 1985 novel by Australian author Thea Astley
- "Beachmaster", a 2009 poem by Clive James