Quintus Lucilius Balbus

{{short description|1st-century BC Roman philosopher}}

Quintus Lucilius Balbus (fl. 100 BC) was a Stoic philosopher and a pupil of Panaetius.

Balbus appeared to Cicero as comparable to the best Greek philosophers.Cicero, De Natura Deorum, i. 6. He is introduced by Cicero in his dialogue On the Nature of the Gods as the expositor of the opinions of the Stoics on that subject, and his arguments are represented as of considerable weight.Cicero, De Natura Deorum, iii. 40, De Divinatione, i. 5. His name appears in the extant fragments of Cicero's Hortensius, but it is no longer thought that Balbus was a speaker in the dialogue.{{cite book|last=Griffin |first=Miriam|contribution =Composition of the Academica|editor1-last=Inwood|editor1-first=Brad|editor2-last=Mansfield|editor2-first=Jaap|title=Assent and Argument: Studies in Cicero's Academic Books|page=3|publisher=Brill|year=1997|isbn=978-90-04-10914-8|doi=10.1163/9789004321014}}