Enrique Loynaz del Castillo (June 5, 1871 – February 10, 1963) was a Dominican-born Cuban general and independence activist of the late 19th-century and early 20th-century.

He was known for his service in the Cuban War of Independence, participating in the battles of Mal Tiempo and Paso de las Damas.

His parents, Enrique Loynaz y Arteaga and Juana del Castillo y Bethancourt were Cubans which resided at the revolutionary delegation at the city.

[2][3] In 1885, Loynaz participated in an expedition to Cuba with generals Serafín Sánchez and Francisco Carrillo Morales where he would meet and come to know Máximo Gómez.

Martí decided to send him to Costa Rica, where he was secretary to Major General Antonio Maceo Grajales, whom he saved his life after a duel with Cuban-Italian Colonel Orestes Ferrara which left him severely wounded at the exit of a theater in San José on November 10, 1894.

[3] He entered the ranks of the Cuban Liberation Army on July 24, 1895, as a member of the expedition of the steamer James Woodall, which landed in Tayabacoa, on the south coast of Las Villas, under the command of Major General Carlos Roloff.

He was assigned to the position of chief of staff of Major General Serafín Sánchez, head of the first division of the fourth corps of Las Villas, with whom he participated in the actions of Taguasco and Los Pasitos.

On September 3, 1895, Loynaz was elected as representative for Camagüey to the Constituent Assembly of Jimaguayú where he drafted the declaration of independence contained in the Constitution approved there.

[3] On June 24, 1897, he was appointed to replace Major General Quintín Bandera with a view to which he reorganized the expeditionary contingent that was in Villareño territory, composed mainly of residents of the Oriente Province.

[2][3] At some point during the early 20th century, he would marry Doña María de las Mercedes Muñoz Sañudo and have two sons, Enrique and Carlos Manuel, and two daughters, Flor [5] and Dulce Maria.

In the final years of his life, he worked as an advisor to the Ministry of State from where he was public opposed to the regime of Dominican dictator Rafael Trujillo.