Aléria is a commune in the Haute-Corse department of France on the island of Corsica, former bishopric and present Latin Catholic titular see. It includes the easternmost point in Metropolitan France.

Corsica is an island in the Mediterranean Sea and one of the 18 regions of France. It is the fourth-largest island in the Mediterranean and lies southeast of the French mainland, west of the Italian Peninsula and immediately north of the Italian island of Sardinia, the nearest land mass. A single chain of mountains makes up two-thirds of the island. As of January 2024, it had a population of 355,528.