Ivan Antunović (Hungarian: Antunovich János; 19 June 1815[1] – 3 January 1888[2]) was a Croatian writer, one of the most prominent public persons among the Bunjevci and Šokci people of his time.
His entry into the public life happened in 1869 in Kalocsa when he published Poziv Bunjevacah, Šokacah i Bošnjakah na utemeljenje jednog pučkog lista (A call to Bunjevci, Šokci and Bosniaks to establish a paper for the people).
He persistently worked on the national awakening of Croat subgroups Bunjevci i Šokci, at the time heavily exposed to intensive assimilatory and decroatization policy.
The main work of Ivan Antunović was his treatise Razprava o podunavskih i potisanskih Bunjevcih i Šokcih u pogledu narodnom, vjerskom, umnom, građanskom i gospodarskom (Discussion of the Bunjevci and Šokci at the Danube and Tisa, in the matters of nationality, religion, mind, citizen life and economy), printed in Vienna in 1882.
His other works included the novel "Odmetnik" (published in Zagreb in 1875, 293 pages), a romantic novel subtitled poviestna pripoviedka (historical story) as the protagonist was based on the Bunjevac scientist Ignjat Martinović (1755–1795), a professor of philosophy and mathematics in the Franciscan monastery in Pest, who abruptly left the Franciscan order and became a Jacobite (a group of revolutionary democrats, named after St. Jacob's Monastery in Paris) after being insulted by the members of the nobility who denied his scholarship because of his descent from a poor family.