Oleksandr Ivanovych Borodai[a] (1844–1919) was a Ukrainian-American engineer, bandurist, and political and cultural activist.

Borodai was born Oleksandr Ivanovych Borodayevski (Ukrainian: Олександр Іванович Бородаєвський, romanized: Oleksandr Ivanovych Borodaievskyi) in the Poltava region of the Russian Empire (now Ukraine).

Later he graduated from a polytechnical institute and became a military engineer electrician.

In the 1890s, he returned to Ukraine and took part in political and cultural activities.

In 1902–1903, he was at the forefront of the preservation of kobzar music by means of sound recording, using the recently invented phonograph.