| Esgairgeiliog | |
|---|---|
 General view of Esgairgeiliog, c.1885 | |
  Esgairgeiliog Location within Powys | |
| OS grid reference | SH759059 |
| Community | |
| Principal area | |
| Preserved county | |
| Country | Wales |
| Sovereign state | United Kingdom |
| Post town | MACHYNLLETH |
| Postcode district | SY20 |
| Dialling code | 01654 |
| Police | Dyfed-Powys |
| Fire | Mid and West Wales |
| Ambulance | Welsh |
| UK Parliament | |
| Senedd Cymru – Welsh Parliament | |
Esgairgeiliog (also known as Ceinws) is a village in Powys (formerly Montgomeryshire), Wales, UK. It is situated at the junction of the Afon Glesyrch's and Afon Dulas' valleys.
Behind the village is the former Era slate quarry, in the Glesyrch valley, and the Centre for Alternative Technology lies about a mile south of the village.