Arnold Barratt McMillin (born 21 June 1941) is a British scholar of Belarusian and Russian studies, Emeritus Professor of Russian Literature, and the author of the first English-language history of Belarusian literature.

Arnold McMillin studied at the University of London where he earned a PhD in Slavic Philology in 1971.

The topic of his dissertation - the vocabulary of the Belarusian literary language in the 19th century - was suggested by a prominent slavist, Robert Auty.

[4] In writing the dissertation, McMillin drew upon the resources and expertise of what would become the Francis Skaryna Belarusian Library and Museum in London.

[5] McMillin's PhD dissertation became the base for his first monograph, The Vocabulary of the Byelorussian Literary Language in the Nineteenth Century, published by the Anglo-Belarusian Society in 1973.