| Official Name: | Jdiouia |
| Native Name: | جديوية |
| Settlement Type: | Commune and town |
| Mapsize: | 180px |
| Pushpin Label Position: | bottom |
| Subdivision Type: | Country |
| Subdivision Name: |  Algeria |
| Subdivision Name1: | Relizane Province |
| Subdivision Type2: | District |
| Unit Pref: | Imperial |
| Population As Of: | 1998 |
| Utc Offset: | +1 |
| Postal Code: | 4814 |
Djediouia or جديوية is a town and commune located at 35°5'46 "north, 0°49'50"east in Relizane Province, Algeria and the presumed site of Ancient city and bishopric Catabum Castra, now a Latin Catholic titular see..[1] by 2008 this had risen to 33,835 and a population density of 254 inhabitants/km2.[2]
The Roman town Catabum Castra was important enough in the Roman province of Mauretania Caesariensis to become a suffragan bishopric of its capital Caesarea in Mauretania's Metropolitan Archbishop. Under the French it was known as Saint Aimé.