Hannah Black is a British visual artist, critic, and writer. Her work spans video, text and performance. She is best known for her open letter written with Ciarán Finlayson and Tobi Haslett, The Tear Gas Biennial, criticizing co-chair of the board of the Whitney Museum, Warren Kanders, and his philanthropic endeavors. These are allegedly made possible through the sale of tear gas and other weapons via Safariland. The letter prompted artists to withdraw works from the 2019 Whitney Biennial.