Calais port is the first French port and the second largest European port for travellers, located in one of the most active economic areas in the world with significant growth prospects.Calais is a major ferry port city located in northern France. Calais metropolitan area has population of around 127,000. This port city overlooks the English Channel's narrowest point - the Strait of Dover, which is just 34 km (21 mi) wide here. This makes Calais France's closest to England town.