Ida Horton East (March 19, 1842–February 4, 1915) was an American philanthropist and social reformer.

Her grandparents came from England and Ireland and could boast a coat-of-arms on both sides of the house, but strong republican sentiments forbade a display of them.

[5] East had 12 older siblings: Hilliard, Mary, Martha, Miranda, Elizabeth, Claiborne, Sarah, Susan, Minerva, William, Frances and Fannie.

Tennie Horton, as she was called, only fourteen years old, was chosen queen, and she on that occasion made a railroad speech that brought in thousands of dollars.

When the Prohibition amendment was before the people of Tennessee, she was active in the work to create a sentiment in its favor.

[2] Though she found little time to write, she wrote for several periodicals, was correspondent for newspapers, and prepared a book for publication.

[2] In 1868, she married Judge Edward H. East, a jurist, who sympathized with and aided her in all her work.

[2] Edward briefly served as Tennessee's acting governor during the interim between Andrew Johnson's inauguration as U.S. Vice President on March 4, 1865, and the inauguration of the state's "elected" governor, William G. Brownlow, on April 5, 1865.

[4] In feeble health for two years, but sick only a short time, Ida Horton East died in Nashville on February 4, 1915.