Appius Annius Trebonius Gallus, sometimes known as Appius Annius Gallus (Greek: Ἄππιος Ἄννιος Γάλλος, flourished 2nd century) was a Roman senator. Annius Gallus was the son of the Roman politician and general Appius Annius Trebonius Gallus and an unnamed Roman noble woman. His paternal grandfather could have been Appius Annius Gallus, one of the suffect consuls in the year 67. He was born into the gens Annia and was a member of the venerable family of the Annii Regilli. Annius Gallus married Atilia Caucidia Tertulla, the daughter of Senator Marcus Appius Bradua and Caucidia Tertulla.