Thida Thavornseth (Thai: ???? ?????????, RTGS: Thida Thawonset, Thai pronunciation: [t?Ãda? t?a?w??nsè?t]; born January 25, 1944) is a Thai assistant professor, microbiologist, pharmacist, and political activist.
She is a retired university lecturer.
Since 2010 she has been the chairperson of the United Front for Democracy Against Dictatorship (UDD), colloquially known as the "Red Shirts".