Piotr Ostaszewski (born 5 April 1964, Żyrardów) is a Polish historian, political scientist and translator.

and Ph.D. in history at the University of Warsaw respectively in 1990 and 1998 for his thesis on Harry S. Truman's policy toward Vietnam.

In 2004 he attained a post-doctoral degree at the Adam Mickiewicz University in Poznań.

[1] Between 1990 and 2000 he worked at the University of Warsaw American Studies Center.

Since 2005 he has been Head of Department of Political Studies and, between 2012 and 2016 vice-rector for teaching and student affairs.