27th Battalion

• 2/27th Battalion (Australia)
• 27 Infantry Battalion (Ireland)
• 27 Squadron (disambiguation)
• 27e bataillon de chasseurs alpins
• 27th Army (disambiguation)
• 27th Battalion (Australia)
• 27th Battalion (City of Winnipeg), CEF
• 27th Battalion Virginia Partisan Rangers
• 27th Brigade (disambiguation)
• 27th Division (disambiguation)
• 27th Engineer Battalion (United States)
• 27th Jäger Battalion (Finland)
• 27th Machine-Gun Battalion (New Zealand)
• 27th Regiment (disambiguation)
• XXVII Corps (disambiguation)