Theodora Emily Colborn(née Decker; March 28, 1927 – December 14, 2014) was Founder and President Emeritus of The Endocrine Disruption Exchange (TEDX), based in Paonia, Colorado, and Professor Emeritus of Zoology at the University of Florida, Gainesville. She was an environmental health analyst, and best known for her studies on the health effects of endocrine disrupting chemicals. She died in 2014.