Sarah Carmichael Harrell (pen name, Citizen; January 8, 1844 – 1929) was an American educator, social reformer, and writer.

[3] Because of her continued interest in education, she took a complete course with the Chautauqua Reading Circle and received about 25 seals for post-graduate work.

During her husband's eight years' service in the Indiana General Assembly, she formed an extended acquaintance among prominent people of the state, and was frequently called upon to fill positions requiring ability and foresight.

[3] In 1891, Harrell was appointed by Governor Alvin Peterson Hovey as a member of Indiana's Columbian Exposition board.

[4] Her greatest work was the origination and carrying to a successful completion of the plan known as the "Penny School Collection Fund of Indiana", used in the educational exhibit in the Columbian Exposition.

With like assurance from teachers, school officers and others, the matter was taken before the Indiana Board of World's Fair Managers, where it was favorably considered, and Harrell was appointed to develop the plan, with instructions to consult with State Superintendent Hervey D. Vories, W. A.

A contemporaneous biographer said of her: "Over the signature of 'Citizen' at the age of sixteen, she (Mrs. Harrell) furnished a series of letters to the local press, showing up the management of the liquor traffic, the boldness of so-called moral and religious men who are its patrons.