Parishes
| Place | Type of Place | Notes
| | Betws Leucu | chapelry, civil parish |
| | Cellan | ancient parish, civil parish |
| | Ciliau Aeron | ancient parish, civil parish |
| | Dihewyd | ancient parish, civil parish |
| | Gartheli | chapelry, civil parish |
| | Lampeter | ancient parish, civil parish |
| | Llanfair Clydogau | ancient parish, civil parish |
| | Llanfihangel Ystrad | ancient parish, civil parish |
| | Llangybi | ancient parish, civil parish |
| | Silian | ancient parish, civil parish |
| | Gwnnws Isaf | township, civil parish |
| | Gwnnws Uchaf | township, civil parish |
| | Llanddeiniol | ancient parish, civil parish |
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