Mary O'Toole (April 4, 1874 – July 24, 1954) was the first woman municipal judge of the United States. Mayor Muriel Bowser declared 21 July 2022 "Mary O'Toole Day" in Washington, D.C. In 2023, a children's book on O'Toole, titled "The Trailblazing Life of Mary O'Toole: A Pioneering Woman on the Bench", co-authored by Nichola D. Gutgold and O'Toole's grand-niece Paula Mulhall, will be published by Eifrig Publishing.