| Ételfay | |
| Commune Status: | Commune |
| Arrondissement: | Montdidier |
| Canton: | Roye |
| Insee: | 80293 |
| Postal Code: | 80500 |
| Mayor: | Marie-Line Bailleul[1] |
| Term: | 2020 - 2026 |
| Intercommunality: | CC Grand Roye |
| Coordinates: | 49.6622°N 2.6197°W |
| Elevation M: | 105 |
| Elevation Min M: | 88 |
| Elevation Max M: | 110 |
| Area Km2: | 8.12 |
Ételfay (in French pronounced as /etɛlfɛ/; Tèrfayin) is a commune in the Somme department in Hauts-de-France in northern France.
Ételfay is situated on the D135e road, some 38km (24miles) southeast of Amiens.