Juan Fermín de Huidobro (died 1689) was a Spanish military engineer who was Governor of Margarita Province, in what is now Venezuela, between 1681 and 1683.
Juan Fermín de Huidobro was born in La Asunción, Isla Margarita, and joined the royal army at an early age.
[3] That year the Council of the Indies ordered him to build a fort with four bastions and a watchtower in Puerto de la Mar, now Porlamar.
[2] Muñoz Gadea antagonized the local people with his demands, including restrictions on trade, and a group led by Fermín arranged to suspend him from office.
[1] He was about to complete the tower at Porlamar when he was arrested on 19 September 1683 by Muñoz de Gadea, whom the Council of the Indies had restored as governor.