The 2 arrondissements of the Landes department are:[1]
- Arrondissement of Dax, (subprefecture: Dax) with 152 communes. The population of the arrondissement was 224,716 in 2016.
- Arrondissement of Mont-de-Marsan, (prefecture of the Landes department: Mont-de-Marsan) with 175 communes.[2] The population of the arrondissement was 180,294 in 2016.