Frederick Mackenzie may refer to:
Politicians Frederick Mackenzie (Quebec politician) (1841–1889), Member of the Canadian Parliament for Montreal West Frederick Donald MacKenzie (1882–1970), Member of the Canadian Parliament for Neepawa
Others Frederick Arthur MacKenzie, journalist and author Frederick Mackenzie (cricketer) (1849-1934), English cricketer Frederick Mackenzie (painter) (1788–1854), British watercolour painter and architectural draughtsman Fred Mackenzie, Scottish golfer Fred T. Mackenzie (born 1934), American sedimentary and global biogeochemist