| Election Name: | 2018 Mauritanian regional elections |
| Country: | Mauritania |
| Ongoing: | no |
| Next Election: | 2023 |
| Seats For Election: | 283 seats in 13 regional councils |
| Registered: | 1,404,734 |
| Turnout: | 1,020,115 (72.62%, first round) |
| Election Date: | 1 September 2018 (first round) |
| First Election: | yes |
| Noleader: | yes |
| Nopercentage: | yes |
| Party1: | Union for the Republic (Mauritania) |
| Seats1: | 167 |
| Party2: | National Rally for Reform and Development |
| Seats2: | 29 |
| Party3: | Union for Democracy and Progress |
| Seats3: | 24 |
| Party4: | HATEM–Tewassoul |
| Seats4: | 21 |
| Party5: | FNDU |
| Seats5: | 18 |
| Party6: | AJD/MR–Tewassoul |
| Seats6: | 5 |
| Party7: | El Vadila |
| Seats7: | 2 |
| Party8: | UFP–Tewassoul |
| Seats8: | 2 |
| Party9: | El Karama |
| Seats9: | 2 |
| Party10: | Tewassoul–RDU |
| Seats10: | 2 |
| Party11: | PTG |
| Color11: |
|
| Seats11: | 2 |
| Party12: | AJD/MR |
| Seats12: | 1 |
| Party13: | APP |
| Seats13: | 1 |
| Party14: | Sawab–RAG |
| Seats14: | 1 |
| Party15: | RFD |
| Seats15: | 1 |
| Party16: | AND |
| Seats16: | 1 |
| Party17: | APP–El Wiam |
| Seats17: | 1 |
| Party18: | UFP–Sawab–RAG |
| Seats18: | 1 |
| Party19: | El Wiam |
| Seats19: | 1 |
| Party20: | APP–AND |
| Seats20: | 1 |
| Map: | Regional councils of Mauritania (after 2018 election).svg |
| Map Size: | 275px |
Regional elections were held in Mauritania on 1 and 15 September 2018, alongside parliamentary and local elections. 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. In the first round, voters choose from one of several lists running. If one list obtains an absolute majority of votes, the council seats would be then distributed proportionally. If not, a second round must be held between the two largest lists. The president of the Regional Council is elected by the Regional Council from one of their members.
The following table lists party control in each regional council after the election.
| Region | New control | ||
|---|---|---|---|
| Adrar | Union for the Republic (UPR) | ||
| Assaba | Union for the Republic (UPR) | ||
| Brakna | Union for the Republic (UPR) | ||
| Dakhlet Nouadhibou | Union for the Republic (UPR) | ||
| Gorgol | Union for the Republic (UPR) | ||
| Guidimaka | Union for the Republic (UPR) | ||
| Hodh Ech Chargui | Union for the Republic (UPR) | ||
| Hodh El Gharbi | Union for the Republic (UPR) | ||
| Inchiri | Union for the Republic (UPR) | ||
| Nouakchott | Union for the Republic (UPR) | ||
| Tagant | Union for the Republic (UPR) | ||
| Tiris Zemmour | Union for the Republic (UPR) | ||
| Trarza | Union for the Republic (UPR) | ||
See main article: 2018 Nouakchott regional election.