Ilse Lehiste (/ˈɪlzə ləˈhɪstə/ IL-zə lə-HIST-ə; 31 January 1922 – 25 December 2010) was an Estonian-born American linguist, author of many studies in phonetics.

In 1944 she fled to Germany with her parents, where she continued her studies – while living in refugee camps – at the University of Hamburg.

Her dissertation, "An acoustic-phonetic study of internal open juncture," was published as a special issue of Phonetica (DOI:10.1159/000258062).

[5] Her main fields of research were acoustic phonetics and phonology, prosody, language contacts, Estonian and Serbo-Croatian.

[12] Ilse Lehiste wrote or co-authored around 20 books and 200 research papers and criticism.

(1977) Cambridge, Massachusetts: MIT Press Ilse Lehiste & Pavle Ivić.

(1988) Cambridge, Massachusetts: MIT Press Jaan Ross & Ilse Lehiste.