The Roman Catholic Diocese of Vilkaviškis (Latin: Vilkavisken(sis)) is a diocese located in the city of Vilkaviškis in the ecclesiastical province of Kaunas in Lithuania. It was established on 4 April 1926 from the Diocese of Łomża, Poland.

• Šv. arkangelo Mykolo bazilika (Basilica of St. Michael the Archangel), Marijampolė.

• Bishop Antanas Karosas (1926.04.05 – 1947.07.07)
• Archbishop Liudas Povilonis, M.I.C. (Apostolic Administrator 1979.05.28 – 1988.04.27)
• Bishop Juozas Žemaitis, M.I.C. (Apostolic Administrator 1988.04.27 – 1991.12.24)
• Bishop Juozas Žemaitis, M.I.C. (1991.12.24 – 2002.01.05)
• Bishop Rimantas Norvila (2002.01.05 – present)

• GCatholic.org
• Catholic Hierarchy
• Diocese website

54°39′N 23°2′E / 54.650°N 23.033°E / 54.650; 23.033