Charlotte Elizabeth McKay (née Johnson; August 2, 1818 – April 10, 1894) was an American editor, Union Army nurse, and an anti-suffragist. She worked as a field nurse during the American Civil War, receiving a Kearny Cross from the 17th Maine Volunteer Infantry Regiment, whom she had cared for after the Battle of Chancellorsville. She was the first woman who protested against the suffrage movement, and she was the editor of the first American anti-suffrage periodical, The True Woman.