La Unión is a canton in the Cartago province of Costa Rica.

The small town they established was called La Unión, meaning The Union, to commemorate their friendliness and brotherhood.

[1] La Unión has an area of 44.83 km2[4] and a mean elevation of 1,331 metres.

[2] La Unión is a compact canton situated midway between the national capital of San José and the former colonial capital city of Cartago.

[7] The Lycée Franco Costaricien, a French international school, is in Concepción district.