The Forth Brigade was a Scottish infantry formation of Britain's Volunteer Force from 1888 to 1902.

The enthusiasm for the Volunteer movement following an invasion scare in 1859 saw the creation of many Rifle Volunteer units composed of part-time soldiers eager to supplement the Regular British Army in time of need.

[1][2][3][4] The Stanhope Memorandum of 1888 proposed a comprehensive Mobilisation Scheme for Volunteer units, which would assemble in their own brigades at key points in case of war.

[5][6] Under this scheme a number of Volunteer Battalions in South East Scotland would assemble together at Edinburgh as the Forth Brigade.

[7] The brigade headquarters was at 51 Hanover Street, Edinburgh, later at Surgeons' Hall in the city.