Gallas may refer to:
Gallas is a Dutch surname, and it either derived from the Celtic word Gallus 'stranger', or a plural for Gaul. A name describing the people who lived in Gallia Belgica.
Matthias Gallas, an Austrian soldier Johann Wenzel von Gallas, an Austrian diplomatist William Gallas, a French footballer The Oromo people, an ethnic group in Ethiopia also known as Gallas