Parishes
Place | Type of Place | Duration | Notes
| Bedwas | Parish (ancient), Civil parish | 1894-1912 | absorbed into Bedwas and Machen Urban District in 1912
| Betws | Parish (ancient), Civil parish | 1894-1935 |
| Coedcernyw | Parish (ancient), Civil parish | 1894-1935 |
| Dyffryn | Township, Civil parish | 1894-1935 |
| Graig | Hamlet, Parish (ancient), Civil parish | 1894-1935 |
| Henllys | Parish (ancient), Civil parish | 1894-1935 |
| Machen Lower | Hamlet, Civil parish | 1894-1935 |
| Machen Upper | Hamlet, Civil parish | 1894-1912 | absorbed into Bedwas and Machen Urban District in 1912
| Malpas | Parish (ancient), Civil parish | 1894-1935 |
| Marshfield | Parish (ancient), Civil parish | 1894-1935 |
| Michaelston Y Vedw | Parish (ancient), Civil parish | 1894-1935 |
| Peterstone Wentlloog | Parish (ancient), Civil parish | 1894-1935 |
| Rogerstone | Township, Civil parish | 1894-1935 |
| Rumney | Parish (ancient), Civil parish | 1894-1935 |
| St. Brides Wentlloog | Parish (ancient), Civil parish | 1894-1935 |
| St. Mellons | Parish (ancient), Civil parish | 1894-1935 |
| St. Woolloos | Parish (ancient), Civil parish | 1894-1935 |
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