Illiberis may refer to:

, a.k.a. Iliberris, Illiberi Liberini, ancient name for Granada Illiberis, a.k.a. Illibere, ancient name for Elne Illiberis (moth), a genus of moths in the family Zygaenidae

See also Elimberri, a.k.a. Auch Elumberris, a.k.a. Lombez Concilium Eliberritanum, a.k.a. Synod of Elvira.