Jan Ciechanowicz (Lithuanian: Ivanas Tichonovicius, Janas Ciechanowiczius, Janas Ciechanovicius; Russian: ???? ????????????? ?????????; born 2 July 1946 in Varniany) is a politician of the Polish minority in Lithuania.
He was one of the couple of ethnic Polish deputies of the Supreme Soviet of the USSR (1989–1991).