The canton Orthe et Arrigans has 24 communes.
| Code | Name | Population ▼ |
|---|---|---|
| 40224 | Peyrehorade | 3 700 |
| 40233 | Pouillon | 3 134 |
| 40118 | Habas | 1 489 |
| 40132 | Labatut | 1 430 |
| 40269 | Saint-Lon-les-Mines | 1 246 |
| 40231 | Port-de-Lanne | 1 232 |
| 40212 | Orthevielle | 1 073 |
| 40183 | Mimbaste | 1 001 |
| 40222 | Pey | 838 |
| 40316 | Tilh | 832 |
| 40186 | Misson | 828 |
| 40211 | Orist | 814 |
| 40077 | Cauneille | 804 |
| 40059 | Cagnotte | 784 |
| 40256 | Saint-Étienne-d'Orthe | 740 |
| 40095 | Estibeaux | 699 |
| 40306 | Sorde-l'Abbaye | 645 |
| 40034 | Bélus | 615 |
| 40120 | Hastingues | 609 |
| 40214 | Ossages | 492 |
| 40101 | Gaas | 470 |
| 40254 | Saint-Cricq-du-Gave | 445 |
| 40206 | Oeyregave | 321 |
| 40199 | Mouscardès | 265 |