Juha is a three-act opera by Aarre Merikanto, with a Finnish libretto by Aino Ackté based on the 1911 novel of the same name by Juhani Aho. Although completed by 1922, it was only finally staged at the music college in Lahti on 28 October 1963. The story is a drama of a love triangle: the older husband Juha, his young wife Marja, and her seducer the merchant Shemeikka. Set in the 1880s in Kainuu in northern Finland, the human tragedy is based around the harsh realities of a farming community and the clash of their lifestyle with the more worldly nomadic Karelians, represented by Shemeikka.

Juhani Aho, originally Johannes Brofeldt, was a Finnish author and journalist. He was nominated for the Nobel Prize in Literature twelve times.