Manuel G. Posadas (18 October 1841 – 13 March 1897) was an Afro-Argentine musician, journalist and Argentine soldier in the nineteenth century.
He married Emily Smith, of Scottish and Afro-Argentine origin from Buenos Aires, and they had at least three children: Carlos, Manuel and Luis Maria.
Posadas rose quickly to the rank of sergeant but due to illness, he had to abandon the campaign and return to Buenos Aires.
He participated in the Revolution of 1874 and after the defeat of the liberal party, he continued teaching music and writing in diverse media outlets in the city including El Eco Artistic and La Nación.
He took an active part in the revolution of 1880 and in the fighting on Monday, June 21 at Puente Alsina and Corrales (the current location of Parque Patricios).