| Béthencourt-sur-Mer | |
| Commune Status: | Commune |
| Image Coat Of Arms: | Blason ville fr Béthencourt-sur-Mer (Somme).svg |
| Arrondissement: | Abbeville |
| Canton: | Friville-Escarbotin |
| Intercommunality: | CC Vimeu |
| Insee: | 80096 |
| Postal Code: | 80130 |
| Mayor: | Denis Durot[1] |
| Term: | 2020 - 2026 |
| Coordinates: | 50.0786°N 1.5042°W |
| Elevation M: | 97 |
| Elevation Min M: | 75 |
| Elevation Max M: | 119 |
| Area Km2: | 2.95 |
Béthencourt-sur-Mer (in French pronounced as /betɑ̃kuʁ syʁ mɛʁ/, literally Béthencourt on Sea; Bétincourt-su-Mér) is a commune in the Somme department in Hauts-de-France in northern France.
The commune is situated on the D19 and D229 road junction, some 3miles from the seaside and 18miles west of Abbeville.