The arrondissement of Béthune was created in 1800.[4] The arrondissement of Lens was created in 1962 from part of the arrondissement of Béthune.[5] At the January 2017 reorganisation of the arrondissements of Pas-de-Calais, it gained three communes from the arrondissement of Arras and one commune from the arrondissement of Lens.[6]
As a result of the reorganisation of the cantons of France which came into effect in 2015, the borders of the cantons are no longer related to the borders of the arrondissements. The cantons of the arrondissement of Béthune were, as of January 2015:[7]