Jens Elmegård Rasmussen (15 March 1944 - 15 May 2013) was associate professor of Indo-European Studies and head of the Roots of Europe research center at the University of Copenhagen from its initiation in 2008 until his death. He was an expert on Proto-Indo-European and Indo-European languages in general, especially morphophonemics, but he also published articles on the history of Eskimo-Aleut languages and linguistic diachrony. He supported the Indo-Uralic and Eurasiatic hypotheses.
Elmegård Rasmussen was the leading editor of the international scholarly journal Tocharian and Indo-European Studies (TIES) and chief editor of the book series Copenhagen Studies in Indo-European. He was married to the Danish Indo-Europeanist Birgit Anette Olsen.