Alexandru Ioan Cuza (1820–1873) was the first ruler of the United Principalities of Moldavia and Wallachia.

Alexandru Ioan Cuza may also refer to: Alexandru Al. Ioan Cuza (1862/4–1889), Romanian aristocrat and politician, son of Alexandru Ioan Cuza Alexandru Ioan Cuza, Cahul, Moldova Alexandru Ioan Cuza, Iași, Romania Alexandru Ioan Cuza University, in Iași, Romania Alexandru Ioan Cuza, a village administered by Fundulea, Romania

See also A. C. Cuza (1857–1947), a Romanian far-right politician