Agostinho Stefan Januszewicz O.F.M. Conv. (29 November 1930 – 20 March 2011) was the Roman Catholic bishop of the Roman Catholic Diocese of Luziânia, Brazil.
Born in Podwojponie, a village in Podlaskie Voivodeship, Poland, just on the Polish-Lithuanian border. Januszewicz was ordained a Franciscan priest in 1958. In 1989, he was named Roman Catholic bishop of the Roman Catholic Diocese of Luziânia, but resigned in 2004.[1] He died of cancer on 20 March 2011 in Juruá, Amazonas, where he was buried.[2]