Charles Mackay, McKay, or MacKay may refer to:Charles Mackay (author) (1814–1889), Scottish poet, journalist, author, anthologist, novelist, and songwriter

Charles McKay (1855–1883), American naturalist and explorer

Charles Mackay (mayor) (1875–1929), New Zealand lawyer, local politician, and Mayor of Wanganui

Charlie MacKay (1880–1953), Australian rules footballer and physician

Charles Reay Mackay, Australian immunologist, fellow of the Australian Academy of Science

Charles R. MacKay, pseudonym for William Harral Johnson and William Stewart Ross used on Life of Charles Bradlaugh, M.P. (1888), a libelous attack on Charles Bradlaugh

Charles MacKay, American arts administrator