'Soulac on Sea'), commonly known as Soulac (Solac), is a commune in the department of Gironde, administrative region of Nouvelle-Aquitaine (formerly Aquitaine), France.

The history of the town remains relatively unknown before the medieval period.

The town was for a time known as Noviomagus, mentioned by Ptolemy in his work Geography as being one of the two parts of a city held by the Bituriges Vivisques tribe, but this theory remains controversial in modern times.

The territory of the town has been inhabited since the Neolithic period and through the Bronze Age, as shown by several archaeological discoveries.

Soulac, today by the sea, was then located on the banks of the river.