| Country: | Wales |
| Official Name: | Abergeirw |
| Coordinates: | 52.844°N -3.829°W |
| Static Image Name: | A simple place of worship - geograph.org.uk - 478156.jpg |
| Static Image Caption: | Abergeirw Chapel |
| Community Wales: | Brithdir and Llanfachreth |
| Unitary Wales: | Gwynedd |
| Constituency Welsh Assembly: | Dwyfor Meirionnydd |
| Constituency Westminster: | Dwyfor Meirionnydd |
| Post Town: | DOLGELLAU |
| Postcode District: | LL40 |
| Postcode Area: | LL |
| Dial Code: | 01341 |
| Os Grid Reference: | SH768289 |
Abergeirw is a hamlet located in Gwynedd, North Wales.
The village of nine properties is located between Dolgellau and Trawsfynydd.
On 19 December 2008 National Grid plc connected it to the UK national electricity power grid, making it the last village in Wales to be supplied with mains electricity.[1]