| Bouillancourt-en-Séry | |
| Commune Status: | Commune |
| Arrondissement: | Abbeville |
| Canton: | Gamaches |
| Insee: | 80120 |
| Postal Code: | 80220 |
| Mayor: | Xavier Duval[1] |
| Term: | 2020 - 2026 |
| Intercommunality: | CC Aumale - Blangy-sur-Bresle |
| Coordinates: | 49.9625°N 1.6292°W |
| Elevation M: | 128 |
| Elevation Min M: | 63 |
| Elevation Max M: | 181 |
| Area Km2: | 16.11 |
Bouillancourt-en-Séry (in French pronounced as /bujɑ̃kuʁ ɑ̃ seʁi/; Bouillincourt-in-Sry) is a commune in the Somme department in Hauts-de-France in northern France.
The commune is situated by the banks of the river Bresle, the border with the Seine-Maritime département, on the D67 road, some 22miles southwest of Abbeville.