Gilbert Waterhouse (22 January 1883 – 1 July 1916), was an English architect and, later, war poet. He was killed on the first day of the Battle of the Somme, in World War I, while serving as a second lieutenant in the 2nd Bn Essex Regiment. A volume of his poems, Rail-Head and other poems (including the poems Rail-Head and Bivouacs), was published posthumously in 1916.