Robert David FitzGerald III AM OBE (22 February 1902 – 24 May 1987) was an Australian poet.
FitzGerald was born in Hunters Hill, New South Wales, a third-generation Australian of Irish extraction, and studied science at the University of Sydney. He left before graduating, however, and followed in the footsteps of both his father and grandfather Robert D. FitzGerald by taking up a post as a surveyor. In the 1930s he travelled to Fiji where he worked the Native Lands Commission, surveying tribal boundaries, an experience important to his poetry. He spent World War II doing engineering surveys in New South Wales and working for the Australian Department of the Interior (from 1939 to 1965).
FitzGerald's poetry, together with that of Kenneth Slessor, was an important modernist influence on Australian literature of the late 1920s and 1930s, being at once more serious and more workmanlike than much of the poetry of the period. Jack Lindsay wrote of them:
In later life, too, FitzGerald was influential, not only through his poetry but as a lecturer and reviewer. He died in Glen Innes, New South Wales, aged eighty-four.