Ivan Šusteršič, also spelled Šušteršič (29 May 1863 – 7 October 1925) was a Slovenian lawyer and politician.
He was born in the Carniolan town of Ribnica, then part of the Austrian Empire (now in Slovenia).
His brother was the Austro-Hungarian Rear Admiral Alois Schusterschitz (Alojz Šusteršič), who participated in the Boxer war of 1900 and in the Peace Treaty negotiations in Paris in 1919.
In 1914 Šusteršič called for violence against Serbs in the aftermath of the Anti-Serb riots in Sarajevo.
[1] He remained Governor of the Duchy of Carniola until October 1918, when he left for Switzerland after a dispute in the Slovene People’s Party: in contrast to party's mainstream, he rejected the creation of an independent State of Slovenes, Croats and Serbs, favoring the federalization of the Austro-Hungarian Empire, instead.