101st Battalion

101st Battalion may refer to:


 * 101 Battalion (Libya), a military insurgent unit
 * 101 Battalion (South Africa), a unit of the South West Africa Territorial Force
 * 101st Battalion (Winnipeg Light Infantry), CEF, a unit of the Canadian Expeditionary Force
 * 101st Engineer Battalion, a unit of the United States Army
 * 101st Signal Battalion, a unit of the United States Army
 * Reserve Police Battalion 101, a Nazi German paramilitary formation of Ordnungspolizei