The Roman Catholic Diocese of Port Blair (Latin: Portus Blairen(sis)) is a diocese located in the city of Port Blair in the ecclesiastical province of Ranchi in India.

• June 22, 1984: Established as Diocese of Port Blair from the Metropolitan Archdiocese of Ranchi

• Bishops of Port Blair (Latin Rite)
  • Bishop Aleixo das Neves Dias, S.F.X. (June 22, 1984 – January 6, 2019)
  • Bishop Visuvasam Selvaraj (June 29, 2021 – present)

• GCatholic.org ^{[self-published]}
• Catholic Hierarchy ^{[self-published]}

11°40′02″N 92°43′53″E / 11.6671°N 92.7314°E / 11.6671; 92.7314

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