Prince Arsenije "Arsen" of Yugoslavia (Serbian: Арсеније Карађорђевић / Arsenije Karađorđević; 16/17 April 1859 – 19 October 1938) was a dynast of the House of Karađorđević and ancestor of the current cadet branch of the Royal Family which ruled Yugoslavia until 1945.

He was born in Timișoara a year after his father Prince Alexander Karađorđević had been deposed from the Serbian throne (the predecessor regime to the Yugoslavian monarchy).

Prince Arsen's elder brother was Peter I, King of Serbia and, later, of the Serbs, Croats and Slovenes.

Prince Arsen was married in Saint Petersburg on 1 May 1892 to Princess Aurora Pavlovna Demidova of San Donato, daughter of Pavel Pavlovich Demidov, 2nd Prince of San Donato (whose uncle, Prince Anatoly Demidov, had been first married to Princess Mathilde Bonaparte) and of Prince Pavel's second wife Princess Elena Petrovna Trubetskaya.

[2] The couple divorced on 26 December 1896 and Aurora Pavlovna was remarried to Count Nicola di Noghera in Genoa on 4 November 1897,[2] with whom she had a daughter, Helena Aurora di Noghera (22 May 1898 – 12 October 1967).