Glenna Smith Tinnin (February 27, 1877 – March 24, 1945) was an American suffragist and the first chairman of the District of Columbia Equal Franchise League.

[2] She was a theater director and playwright, and served as chairman of the pageant committee of the American Federation of Arts.

[3] She wrote several plays for children (with Katharine S. Brown) including One Night in Bethlehem: A Play of the Nativity (1925) and Arthur Wins the Sword (1928)[4] In December 1931 Tinnin and Brown staged a production of Paul Kester's Tom Sawyer on Broadway at the Alvin Theatre, which closed after 6 performances.

In 1913, she collaborated with Hazel MacKaye to create the pageant Allegory held on steps of the U.S. Treasury Building as part of the Woman Suffrage Procession, a large suffrage demonstration held the day before the inauguration of Woodrow Wilson.

Later that year, they collaborated again, creating the pageant Uncle Sam's 137th Birthday Party to celebrate Independence Day on July 4, 1913.