| Lencouacq | |
| Commune Status: | Commune |
| Image Coat Of Arms: | Blason ville fr Lencouacq (Landes).svg |
| Arrondissement: | Mont-de-Marsan |
| Canton: | Haute Lande Armagnac |
| Insee: | 40149 |
| Postal Code: | 40120 |
| Mayor: | Gérard Portet[1] |
| Term: | 2020 - 2026 |
| Intercommunality: | Landes d'Armagnac |
| Coordinates: | 44.1°N -0.4033°W |
| Elevation M: | 82 |
| Elevation Min M: | 75 |
| Elevation Max M: | 128 |
| Area Km2: | 96.62 |
Lencouacq (pronounced as /fr/; oc-gascon|Lencoac) is a commune in the Landes department in Nouvelle-Aquitaine in south-western France.
Between 1907 and 1934, Lencouacq was the terminus of the 121NaN1 long gauge Chemin de fer Économiques Forestiers des Landes railway line from Roquefort.[2]