| Lignières-Châtelain | |
| Commune Status: | Commune |
| Image Coat Of Arms: | Blason Lignières-Châtelain.svg |
| Arrondissement: | Amiens |
| Canton: | Poix-de-Picardie |
| Insee: | 80479 |
| Postal Code: | 80290 |
| Mayor: | Hubert Avet[1] |
| Term: | 2020 - 2026 |
| Intercommunality: | Somme Sud-Ouest |
| Coordinates: | 49.7756°N 1.8636°W |
| Elevation M: | 195 |
| Elevation Min M: | 186 |
| Elevation Max M: | 209 |
| Area Km2: | 6.54 |
| Demonym: | Ligniérois, Ligniéroises |
Lignières-Châtelain (in French liɲjɛʁ ʃɑtlɛ̃/; Lignère-Catelain) is a commune in the Somme department in Hauts-de-France in northern France.
The commune is situated on the N29 road, some 23miles southwest of Amiens.