Mellaria was a Roman settlement in Hispania Baetica, on the coast of the Strait of Gibraltar in what is now the Province of Cádiz in Spain.
In the 18th century Ignacio Lopez de Ayala identified Mellaria with the town of Tarifa, where coins, foundations and other ancient relics had been found.
It has therefore been common to locate Mellaria in the west of the municipality of Tarifa, near Casas de Porro, where the Río del Valle enters the sea.
[1] In his Natural History, Pliny the Elder states that the narrowest part of the Strait was between the vicus of Mellaria and the Promunturium Album on the coast of Africa.
[2] Plutarch records a naval battle off the coast of Mellaria in 80 BC in which Quintus Sertorius defeated to Gaius Aurelius Cotta at the start of his rebellion in Spain.