Janusz Jasiński (born September 4, 1928 in Wołomin) is a Polish historian.
He obtained his PhD, under the supervision of Stefan Kieniewicz in 1964 from the University of Warsaw with the dissertation on agrarian reforms in Warmia at the turn of the 19th century ("Reformy agrarne na Warmii w początkach XIX wieku").
He was habilitated in 1982 at the Nicolaus Copernicus University in Toruń on the basis of his work on national identity and consciousness in 19th century Warmia ("Świadomość narodowa na Warmii w XIX wieku").
As the editor he took special care to establish the journal's independence from the political influence of the authorities of the People's Republic of Poland.
He has been the recipient of numerous awards, including the Knight's and the Officer's Cross of Polonia Restituta, the Secretary's Medal of the Polish Academy of Sciences, the Zygmunt Gloger Award, and others, including an honorary citizenship of the city of Olsztyn.