Susanna Hirzel, known as Susette (1769–1858) was a Swiss painter.
Born in Zürich, Hirzel was the niece of painter Heinrich Hirzel, and studied briefly with August Friedrich Oelenhainz and a member of the Füssli family; she was, however, mainly self-taught. She married Ratsherr Hans Conrad Ott in 1801. Her brother Caspar was a soldier in the service of France, active as an amateur artist as well. Hirzel produced portraits in oil and pastel, and her work is represented in numerous collections in her native city.
- Profile in the Dictionary of Pastellists Before 1800.