| Official Name: | Unión de Reyes |
| Settlement Type: | Municipality |
| Subdivision Type: | Country |
| Subdivision Name: | Cuba |
| Subdivision Type1: | Province |
| Subdivision Name1: | Matanzas |
| Established Title: | Founded |
| Established Date: | 1844 |
| Established Title2: | Established |
| Established Date2: | July 1, 1879 |
| Area Total Km2: | 856 |
| Population As Of: | 2022 |
| Population Total: | 35,021 |
| Population Density Km2: | auto |
| Timezone: | EST |
| Utc Offset: | -5 |
| Coordinates: | 22.8003°N -81.5372°W |
| Elevation M: | 55 |
| Area Code: | +53-52 |
Unión de Reyes is a municipality and town in the Matanzas Province of Cuba. It is located in the western part of the province, 30km (20miles) south of Matanzas, the provincial capital.
Unión de Reyes was founded in 1844, and it was established as a municipality on July 1, 1879. Its name derives from Unión en el Punto de Reyes, so named for its location at a railway junction.[1]
The municipality, originally divided into the barrios of Iglesia and Unión,[2] 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.
In 2022, the municipality of Unión de Reyes had a population of 35,021.[3] With a total area of 856km2,[4] it has a population density of 41/km2.