The Diocese of Muzaffarpur (Latin: Muzaffarpuren(sis)) is a diocese located in the city of Muzaffarpur in the ecclesiastical province of Patna in India.

• March 6, 1980: Established as Diocese of Muzaffarpur from the Diocese of Patna.

• Bishops of Muzaffarpur
  • Bishop John Baptist Thakur, S.J. (March 6, 1980 – July 11, 2014)
  • Bishop Cajetan Francis Osta (July 11, 2014 – present)

• GCatholic.org
• Catholic Hierarchy

26°07′12″N 85°22′37″E / 26.1200°N 85.3769°E / 26.1200; 85.3769