24th Battalion may refer to:

• 24th Battalion (Australia), an infantry battalion of the Australian Army that served in World War I
• 2/24th Battalion (Australia), an infantry battalion of the Australian Army that served in World War II
• 24th Battalion (International Brigade), Cuban volunteer unit that fought for the Republicans during the Spanish Civil War
• 24th Battalion (Victoria Rifles), CEF, a Canadian infantry battalion that served in World War I
• 24th Battalion (New Zealand), a World War II infantry battalion from New Zealand
• 24th Battalion (Ukraine), a volunteer battalion of the Ukrainian Army that served in War in Donbas
• 24th Battalion, Royal Fusiliers (2nd Sportsmen's)