31st Group may refer to:

• 31 Canadian Brigade Group, a unit of the Canadian Army
• Marine Aircraft Group 31, a unit of the United States Marine Corps
• 31st Operations Group, a unit of the United States Air Force

• 31st Division (disambiguation)
• 31st Brigade (disambiguation)
• 31st Regiment (disambiguation)
• 31st Battalion (disambiguation)
• 31st Squadron (disambiguation)

Topics referred to by the same term

This 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.