Pornic (Pornizh in Breton, Port-Nitz in Gallo) is a commune in the Loire-Atlantique département, in South-Eastern Brittany, in western France.In 1973 the commune of Pornic absorbed the neighbouring municipalities of Sainte-Marie-sur-Mer and Clion-sur-Mer, whose inhabitants were called respectively Sanmaritains and Clionnais.