La Unión, in the Region of Murcia, is part of the province of Murcia. The municipality covers about 25.1 km² and had 21,380 inhabitants on 1 January 2025.
Density, at about 852 inhabitants per km², is that of a populous urban area, with residential districts, services and businesses. Of the 37 municipalities in the province of Murcia with at least 5,000 inhabitants, it is number 18 by population.
As the crow flies it lies about 40 km south-east of Murcia, the provincial capital. The nearest major city is Valencia, about 210 km away.
Nearby, within a few dozen kilometres, are other destinations featured in our guides: Cartagena (9 km), San Pedro del Pinatar (26 km), Torrevieja (44 km).
Below you will find a map of neighbouring municipalities, the weather, places to stay in the area and a link to all the municipalities in the province of Murcia.