The 3 arrondissements of the Loire-Atlantique department are:
In 1800 the arrondissements of Nantes, Ancenis, Châteaubriant, Paimbà Âuf and Savenay were established. In 1868 Saint-Nazaire replaced Savenay as subprefecture. The arrondissements of Ancenis and Paimbà Âuf were disbanded in 1926, and Ancenis was restored in 1943. The arrondissement of Châteaubriant-Ancenis was created in January 2017 from the former arrondissements of Châteaubriant and Ancenis and 4 communes from the arrondissement of Nantes.