The canton Pays morcenais tarusate has 23 communes.
| Code | Name | Population ▼ |
|---|---|---|
| 40197 | Morcenx-la-Nouvelle | 5 022 |
| 40313 | Tartas | 3 169 |
| 40243 | Rion-des-Landes | 3 142 |
| 40230 | Pontonx-sur-l'Adour | 3 021 |
| 40333 | Ygos-Saint-Saturnin | 1 334 |
| 40031 | Bégaar | 1 251 |
| 40180 | Meilhan | 1 237 |
| 40309 | Souprosse | 1 184 |
| 40142 | Laluque | 1 102 |
| 40210 | Onesse-Laharie | 1 079 |
| 40152 | Lesperon | 1 043 |
| 40006 | Arengosse | 711 |
| 40067 | Carcen-Ponson | 628 |
| 40285 | Saint-Yaguen | 625 |
| 40066 | Carcarès-Sainte-Croix | 533 |
| 40151 | Lesgor | 427 |
| 40018 | Audon | 409 |
| 40040 | Beylongue | 400 |
| 40330 | Villenave | 312 |
| 40143 | Lamothe | 308 |
| 40215 | Ousse-Suzan | 297 |
| 40116 | Gouts | 271 |
| 40153 | Le Leuy | 225 |