Peter Abir Antonisamy (7 April 1952, Sathipattu, Cuddalore District, Tamil Nadu, India) is an Indian prelate of the Roman Catholic Church.

[1] He was born in Sathipattu, Cuddalore District, Tamil Nadu, India on 7 April 1952.

Archbishop Francis Kallarakal and Bishop Thomas Aquinas Lephonse acted as co-consecrators.

On 27 January 2021, Pope Francis appointed Bishop Peter Abir as Apostolic Administrator of the Archdiocese of Pondicherry and Cuddalore upon the resignation of its Archbishop Antony Anandarayar.

His office as Apostolic Administrator ceased by the appointment of Bishop Francis Kalist as Archbishop of Pondicherry on 19 March 2022.