They were the first elections to the newly created regional councils.

Regional councils were created in Mauritania following a 2017 constitutional referendum that abolished the Senate, replacing it with regional councils in every wilaya and a single one for the city of Nouakchott.

[1] Regional councils in Mauritania are elected using the proportional representation system of the largest remainder method with two rounds.

If one list obtains an absolute majority of votes, the council seats would be then distributed proportionally.

[citation needed] The following table lists party control in each regional council after the election.