亚历山德鲁·约安·库扎（Alexandru Ioan Cuza） (发音：[alekˈsandru iˈo̯an ˈkuza] 或称亚历山德鲁·约安一世（Alexandru Ioan I），英文拼为亚历山大·约翰·库扎Alexander John Cuza; 1820年3月20日－1873年5月15日) 摩尔多瓦亲王和瓦拉几亚亲王，1862年成为统一的罗马尼亚的首位大公。他发起了全国乡村改革和农民解放等一系列的改革，是罗马尼亚社会现代化和国家机构的设计师。罗马尼亚最古老的大学亚历山德鲁伊万库扎大学以他的名字命名。

Alexandru Ioan Cuza (pronounced [alekˈsandru iˈo̯an ˈkuza], or Alexandru Ioan I, also anglicised as Alexander John Cuza; 20 March 1820 – 15 May 1873) was Prince of Moldavia, Prince of Wallachia, and later Domnitor (ruler) of the Romanian Principalities. He was a prominent figure of the Revolution of 1848 in Moldavia. He initiated a series of reforms that contributed to the modernization of Romanian society and of state structures.