31st Battalion may refer to:
- 31st Battalion, Royal Queensland Regiment, a unit of the Australian Army
- 31st/42nd Battalion, Royal Queensland Regiment, a unit of the Australian Army
- 2/31st Battalion (Australia), a unit of the Australian Army that was raised during World War II
- 31st (Alberta) Battalion, CEF, a unit of the Canadian Army
- 31st Infantry Battalion (Estonia), a unit of the Estonian Army
- 31st Engineer Battalion, a unit of the United States Army
- Combat Logistics Battalion 31, a unit of the United States Marine Corps
See also
- 31st Division (disambiguation)
- 31st Group (disambiguation)
- 31st Brigade (disambiguation)
- 31st Regiment (disambiguation)
- 31st Squadron (disambiguation)
Topics referred to by the same termThis disambiguation page lists articles about military units and formations which are associated with the same title. If an internal link referred you to this page, you may wish to change the link to point directly to the intended article.
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