Jakob Missia (30 June 1838 – 24 March 1902) was a Slovene prelate of the Catholic Church who was Archbishop of Gorizia and Gradisca from 1898 until his death.

Ivan Hribar, Mayor of Ljubljana and an advocate of Slovenian nationalism, considered Missia pro-German and complained of him to the Vatican.

[4] Upon the nomination of Emperor Franz Joseph I, Missia was transferred to the Archdiocese of Gorizia and Gradisca, now in Italy, on 24 March 1898.

[5] Pope Leo XIII raised him to the rank of cardinal at the on 18 June 1899,[6][7] granting the title of Santo Stefano Rotondo.

[1][8] His nephew and protégé Father Francis A. Missia (1884–1955) emigrated to the United States in 1903 and played an important role in 20th-century liturgical music.