Erwig (Latin: Flavius Ervigius after 642 – 687) is a king of the Visigoths in Hispania (680–687).

He is the only Visigothic king to be a complete puppet of the bishops and palatine nobility.

According to the 9th-century Chronicle of Alfonso III, Erwig was the son of Ardabast, who had journeyed from Constantinople to Hispania during the time of Chindasuinth, and married Chindasuinth's niece Goda.

Erwig had Visigothic, Hispano-Roman, Frankish, Armenian, Greek, and Roman ancestry.