| Country: | Wales |
| Constituency Welsh Assembly: | Ceredigion |
| Official Name: | Cilcennin |
| Coordinates: | 52.22°N -4.17°W |
| Unitary Wales: | Ceredigion |
| Lieutenancy Wales: | Dyfed |
| Constituency Westminster: | Ceredigion Preseli |
| Postcode District: | SA48 |
| Postcode Area: | SA |
| Dial Code: | 01570 |
| Os Grid Reference: | SN522602 |
| Static Image: | Western approach to Cilcennin - geograph.org.uk - 1877933.jpg |
| Static Image Width: | 240px |
| Static Image Caption: | Western approach to Cilcennin |
Cilcennin is a village in the community of Ciliau Aeron, Ceredigion, west Wales. The River Aeron is to the southwest.
Cilcennin is the site of a historic slaughter in 1210, when Owain Goch ap Gruffydd and three hundred men attacked and killed soldiers from a superior English and Welsh troops' body under the command of their uncle Maelgwn ap Rhys.[1]
The church in Cilcennin is dedicated to St. Cannen, and was rebuilt in the 19th century through public contributions.[1]