Gallas may refer to:

• Matthias Gallas, an Austrian soldier
• William Gallas, a French footballer
• The Oromo people, an ethnic group in Ethiopia also known as Gallas

• Thietmar of Merseburg
• Thietmar of Prague
• Thieu
• Thieusies
• Thieu-tri
• Thieux
• Thieux, Seine-et-Marne
• Thievery
• Thieves and kings
• Thieves and Kings
• Thieves (band)
• Thieves (EP)
• Thieves Gold
• Thieves' Gold
• Thieves guild
• Thieves' guild
• Thieves Holm
• Thieves in Black
• Thieves in law
• Thieves In The Temple
• Thieves In the Temple
• Thieves & Kings
• Thieves Like Us (film)
• Thieves Like Us (novel)
• Thieves Like Us (song)