The Central Area is broadly bounded to the north by the A48, east by River Rhymney, south by Cardiff Bay and west by the River Ely.
Mae’r Ardal Ganolog wedi’i ffinio yn fras i’r gogledd gan yr A48, i’r dwyrain wrth Afon Rhymni, i’r de wrth Fae Caerdydd ac i’r gorllewin ger Afon Trelái.