The West Sussex County Division was a formation of the British Army, raised in the Second World War and formed by the redesignation of Brocforce on 9 November 1940.

On 18 February 1941, the headquarters was redesignated as the Essex County Division.

It was commanded by four officers, Major-General Edwin Morris from formation until 16 December, Brigadier A. E. Lawrence until 29 December, Major-General Sir Oliver Leese until 30 January 1941 and then Brigadier H. J. Parham.

Usually, combat support, artillery, engineers etc., would be provided by other local formations, exceptionally, for a county division, the 29th Brigade Group commanded additional units.

[3] The brigade group transferred to IV Corps after leaving the division.