Gallus may refer to:

• Saint Gall or Gallus (c. 550 – c. 646), Irish monk
• Gallus Anonymus, 12th-century Polish historian
• Gallus, Bishop of Transylvania, 13th-century Hungarian prelate
• Gallus Mag, 19th-century female bouncer at a New York bar
• Georg Gallus (1927–2021), German politician
• Chris Gallus (born 1943), Australian politician
• Thomas Gallus (c. 1200–1246), French theologian
• Jacobus Gallus (1550–1591), Slovene composer
• Nicolaus Gallus (c. 1516–1570), German Lutheran Reformer
• Sandor Gallus (1907–1996), Australian archaeologist

• Constantius Gallus (326–354), junior Roman emperor from 351 to 354
• Cornelius Gallus (c. 70–26 BC), Roman poet, orator and politician
• Quintus Roscius Gallus (c. 126–62 BC), Roman actor
• Trebonianus Gallus (206–253), Roman emperor

• Gallus (genus), a genus of birds including junglefowl and domestic chickens
• Gallus Lacepède, 1802, a synonym for the fish genus Alectis
• Gallus (constellation), the cockerel, an obsolete constellation

• Gallus, the singular form of Galli, the eunuch priests of the Phrygian goddess Cybele
• Gallus (album), 1992 album by Scottish rock band Gun
• Gallus (Frankfurt am Main), a district of Frankfurt, Germany
• Gallus (professional wrestling), a Scottish professional wrestling stable

• All pages with titles containing Gallus
• Galli (disambiguation)