Wojciech Jacek Zajączkowski[1] (born 19 December 1963 in Bydgoszcz)[2] is a Polish diplomat and historian.

[2] In 1999 he defended at the Institute of Political Studies of the Polish Academy of Sciences his PhD thesis on ethnic minorities in 19th-century Russia and USSR.

[4] From 1991 to 1998 for the Centre for Eastern Studies as an analyst, Senate of Poland as an advisor, Stefan Batory Foundation as a director of the Central-Eastern Europe Forum.

[4] He presented his credentials to the President of the People's Republic of China Xi Jinping on 23 March 2018.

Besides his native Polish, he speaks English, French, Romanian, Russian and Ukrainian languages.