What year did Spain become a country?

Spain became a country in 1492 when the Emirate of Granada was seized by the Spanish forces. Grenada had been the only province of those comprising the territory of modern Spain that was still controlled by the Moors.

The Iberian peninsula had been previously been controlled by disparate kingdoms, but with the marriage of Isabel of Castile and Ferdinand of Aragon (king and queen during the conquest of Granada), the royal families of Spain were united. When the modern territory of Spain was established in 1492, it was as a unified, Spanish kingdom, ruled as one nation instead of several independent kingdoms.