Robert George Dundas Fitzgerald (5 January 1846 – 24 December 1933) was a New Zealand-born Australian politician.

He was born at Auckland to cotton planter Robert Appleyard Fitzgerald and Isabella Stevenson.

He established a partnership in Muswellbrook, and served as a local alderman (1871–73, 1878–80, 1885–86) and mayor (1878–79).

In 1885 he was elected to the New South Wales Legislative Assembly as one of the two members for Upper Hunter.

In April 1901 he was appointed Minister of Justice in the See ministry, but was defeated at the 1901 election for Robertson.