Antonio Agliardi (4 September 1832 – 19 March 1915) was an Italian Roman Catholic Cardinal, archbishop, and papal diplomat.

[1] He studied theology and canon law, and after acting as parish priest in his native diocese for twelve years was sent by the pope to Canada as a bishop's chaplain.

[1] In 1884, he was created by Pope Leo XIII Archbishop of Caesarea in partibus and sent to India as an Apostolic Delegate to report on the establishment of the hierarchy there.

Allowing himself to be involved in the ecclesiastical disputes that divided Hungary in 1895, he was made the subject of formal complaint by the Hungarian government and in 1896 was recalled.

[2] In 1903, he was named vice-chancellor of the Catholic Church,[1] and became the Chancellor of the Apostolic Chancery in the Secretariat of State in 1908.