Joseph Coles Kirby (10 June 1837 – 1 August 1924)[1] was an English flour miller who migrated to Sydney, Australia in 1854. In 1864, Kirby was ordained in the Congregational Churches and then ministered to rural and city congregations in Queensland and South Australia and supported or led many causes for social reform such as the temperance movement, women's suffrage and "social purity", raising the age of consent to 16 in Australia.