Alexander Harkavy (Yiddish: אַלכּסנדר האַרקאַווי, Russian: Александр Гаркави, Aleksandr Garkavi; May 5, 1863 at Novogrudok (Yiddish: נאַוואַרעדאָק), Minsk Governorate, Russian Empire (now Navahrudak, Hrodna Voblast, Belarus) - 1939 in New York City) was a Russian-born American writer, lexicographer and linguist.