Juan Niceto de Zamacois y Urrutia (20 March 1820 in Bilbao – 29 September 1885 in Mexico City) was a Spanish journalist, playwright, poet, novelist and historian resident in Mexico.
He was half-brother of the painter Eduardo Zamacois y Zabala, the singer Elisa Zamacois, and the actor Ricardo Zamacois, and also was uncle of the writers Miguel Zamacoïs and Eduardo Zamacois.