Ihor Ivanovych Ostash (Ukrainian: Ігор Іванович Осташ; born 4 August 1959) is a Ukrainian diplomat and politician currently serving as ambassador of Ukraine to Lebanon since 2016, previously serving as ambassador of Ukraine to Canada from 2006 to 2011.

Ihor Ostash was born on 4 August 1959 in the village of Duliby (Lviv Oblast, Ukraine).

Ostash graduated from Lviv Ivan Franko State University (Ukraine), Slavic Department of the Philological Faculty (1982).

Languages: Ukrainian, English, French, Czech, Polish, Slovak, Serbian, Croatian, Russian.

[2] From 1986 to 1994, Ostash was a member of the Academy of Sciences of Ukraine's Oleksandr Potebnya Institute of Linguistics, researcher Department of Literature, Language and Art in the Presidium of the Academy of Sciences, academic secretary International School of Ukrainian Studies, director.