| Country: | Wales |
| Static Image Name: | Capel Caeathro - geograph.org.uk - 1552182.jpg |
| Static Image Caption: | Caeathro Chapel |
| Coordinates: | 53.131°N -4.242°W |
| Official Name: | Caeathro |
| Population: | 237 |
| Community Wales: | Waunfawr |
| Unitary Wales: | Gwynedd |
| Lieutenancy Wales: | Gwynedd |
| Constituency Westminster: | Arfon |
| Constituency Welsh Assembly: | Arfon |
| Post Town: | CAERNARFON |
| Postcode District: | LL55 |
| Postcode Area: | LL |
| Dial Code: | 01286 |
| Os Grid Reference: | SH500616 |
Caeathro is a village situated on the A4085 road between Caernarfon and Waunfawr in Gwynedd, northwest Wales. It is approximately 2 km from Caernarfon and 1.5 km from Waunfawr.
It is part of Waunfawr community. The population was 237 as of the 2011 census.