Her interests in women and temperance led Caradus to the first meetings of the Women’s Christian Temperance Union, established in Auckland in 1885. She quickly became a key member of the WCTU and the Auckland branch of the Women’s Franchise League, formed in 1892. Throughout the franchise campaign, and later, in the Auckland branch of the National Council of Women of New Zealand, Elizabeth Caradus was a leading figure. However, she rarely took a prominent office, perhaps because of financial restraints or business or family commitments. Caradus differed from most of the suffragist leaders in that she was of working-class origins and upbringing and had a large family to care for. Although she became treasurer of the WFL in 1893, she turned down the post of president of the Auckland branch of the WCTU. However, she frequently spoke publicly, moved resolutions and took part in deputations.