Unión de Reyes is a municipality and town in the Matanzas Province of Cuba.

It is located in the western part of the province, 30 kilometres (19 mi) south of Matanzas, the provincial capital.

Unión de Reyes was founded in 1844,[1] and it was established as a municipality on July 1, 1879.

[4] The municipality, originally divided into the barrios of Iglesia and Unión,[1] is divided into 9 consejos populares (i.e. "people's councils"): the town of Unión de Reyes and the villages of Alacranes, Bermejas, Cabezas, Cidra, Estante, Juan Ávila, Juan G. Gómez and Puerto Rico.

[citation needed] In 2022, the municipality of Unión de Reyes had a population of 35,021.