The Roman Catholic Diocese of Kaišiadorys (Latin: Kaisiadorensis) is a diocese located in the city of Kaišiadorys in the Ecclesiastical Province of Vilnius in Lithuania. It was established on 4 April 1926 from the Metropolitan Archdiocese of Vilnius.

(all Roman Rite)

1. Juozapas Kukta (5 April 1926 – 16 June 1942 Died)
2. Teofilius Matulionis (9 January 1943 – 20 August 1962 Died)
3. Juozapas Matulaitis-Labukas (24 December 1991 – 11 February 2012 Retired)
4. Jonas Ivanauskas (11 February 2012 – )

Between 1982 and 1991, Kaišiadorys was led by Apostolic Administrators rather than bishops.

• Vincentas Sladkevičius, MIC (15 July 1982 – 10 March 1989)
• Juozapas Matulaitis-Labukas (10 March 1989 – 24 December 1991)

• List of Roman Catholic dioceses of Lithuania

• GCatholic.org
• Catholic Hierarchy
• Diocese website

54°51′N 24°27′E / 54.850°N 24.450°E / 54.850; 24.450