Robert Gillies (1835 – 15 June 1886) was a 19th-century Member of Parliament in the Otago region, New Zealand.
He represented the Bruce electorate from 1884 until his resignation in 1885 for failing health.
He died on 15 June 1886 from an aneurysm of the heart. He was the brother of Thomas Gillies and John Lillie Gillies, and the father of surgeon Harold Gillies.