Susannah Fullerton OAM, FRSN (born 1960) is a Canadian-born Australian author and literary historian.
She has been president of the Jane Austen Society of Australia since 1996, which is the largest literary society in Australia.
She is also patron of the Rudyard Kipling Society of Australia.
Her subject matter includes Jane Austen, Charles Dickens, Anthony Trollope, the Mitford family, Samuel Pepys, Vita Sackville-West, Oscar Wilde, George Eliot, the Romantic Poets, and Shakespeare.