Henry Brett may refer to:
Henry Brett (MP for Gloucester) (–1674), English Royalist politician Henry Brett (colonel) (died 1724), English army officer and Tory politician Henry Brett (journalist) (1843–1927), New Zealand journalist, newspaper proprietor, publisher, writer, politician Henry Brett (polo player) (born 1974), English polo player Henry Brett (priest) (1868–1932), Dean of Belfast