Ceslaus Sipovich (Belarusian: Чэслаў Сіповіч, Łacinka: Česłaǔ Sipovič) (December 8, 1914 – October 4, 1981) was a bishop of the Belarusian Greek Catholic Church.
He was appointed titular bishop of Mariamme in 1960, and served as Superior General of the Congregation of Marian Fathers from 1963 to 1969. He was also Apostolic Visitor for Belarusian Catholic faithful abroad.
Bishop Sipovich was a significant figure of the Belarusian émigré community in the United Kingdom, one of the members of the Association of Belarusians in Great Britain.
- Alexander Nadson '"Bishop Ceslaus Sipovic", Journal of Byelorussian Studies, 5:1.
- Alexander Nadson. "Ceslaus Sipovich. The First Belarusian Catholic Bishop in the 20th Century". Minsk, Technalohija, 2007. 224 pp.