The 33rd Infantry Brigade was an infantry brigade of the British Army that saw active service in the First World War and home service during the Second World War.

The 33rd Brigade was formed in the Great War in August 1914 as part of Kitchener's Army, initially made up of volunteer service battalions from a variety of different infantry regiments.

Between February and September 1917 it was under the command of Brigadier-General Arthur Daly.

[1][2][3] From September 1917 to the end of the war it was commanded by Brigadier-General Frederick Spring.

The brigade was intended for home defence in the event of a German invasion and never left the United Kingdom.