The Working Group on the Assessment of Demersal Resources – Subgroup North was held in Nouakchott, Mauritania from 2 to 10 December 2019. The overall objective of the Group is to contribute to the improvement of the management of demersal resources in Northwest Africa through assessment of the state of the stocks and the fisheries to ensure the best sustainable use of the resources for the benefit of the coastal countries. In all, 19 researchers from five different countries participated in the meeting, along with FAO. FAO wishes to thank the participants of the Working Group who contributed towards this report, the meeting host in Mauritania: Institut Mauritanien de Recherches Océanographiques et de Pêches (IMROP), and the financial support of the European Commission.