Illyricum can refer to:
- Illyria, a region in the Balkans in classical antiquity, inhabited by ancient Illyrians
- Illyricum (Roman province), a Roman province that existed between 167 BC and 10 AD
- Diocese of Illyricum, a diocese of the Late Roman Empire
- Praetorian prefecture of Illyricum, one of four praetorian prefectures into which the Late Roman Empire was divided
|This disambiguation page lists articles about distinct geographical locations with the same name.
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