The 58th Battalion was an infantry battalion of the Australian Army. It was raised in 1916 for overseas service during World War I and saw action on the Western Front from June 1916 until the end of the war. Following the end of hostilities it was disbanded in 1919, however, in 1921 the battalion was re-raised as part of the part-time Citizens Force (later known as the Militia) and remained in existence until 1942 when it was amalgamated with the 59th Battalion to form the 58th/59th Battalion. That battalion subsequently saw active service in the Pacific against the Japanese during World War II.