Petar Antun Rajič (born 12 June 1959) is a Croatian/Canadian prelate of the Catholic Church who has worked in the diplomatic service of the Holy See since 1993.

[1][2] He entered the diplomatic service of the Holy See on 1 July 1993 and fulfilled assignments in Iran and Lithuania as well as in the office of the Secretariat of State in Rome.

[3] He received his episcopal consecration on 23 January 2010 from Cardinal Tarcisio Bertone.

[4] On 15 June 2015, Pope Francis named him apostolic nuncio to Angola and São Tomé e Principe.

[5] On 15 June 2019 he was named apostolic nuncio to Lithuania,[6] adding the responsibilities of Estonia and Latvia on 6 August.