73rd Brigade may refer to:
India 73rd Indian Infantry Brigade
South Africa 73 Motorised Brigade (South Africa)
United Kingdom 73rd Brigade (United Kingdom) 73rd (Howitzer) Brigade, Royal Field Artillery, British Army unit during World War I 73rd (Northumbrian) Brigade, Royal Field Artillery, British Army unit after World War I 73rd Anti-Aircraft Brigade, Royal Artillery
United States 73rd Infantry Brigade (United States)
See also 73rd Division (disambiguation) 73rd Regiment (disambiguation)