Despite the importance of Loranthaceae parasites of woody plants in traditional African medicine, very few studies have been carried out on their diversity in the Sudano-Sahelian zone of Cameroon. The study aims to examine the diversity of Loranthaceae parasites of woody plants and determine their altitudinal distribution over the Mandara Mountains in the Far North region, Cameroon. It took place in nine (09) borough spread over four Departments of the Mandara Mountains. The experimental setup is made up of 15 Hills (Altitude ≥ 1000m) representing the main treatment. The 15 Hills are chosen at the rate of one Mount every 10 km in the whole of the Mandara Mountains. The Mounts were grouped by three according to the level of Altitude of the plain of each Mount to find five Mounts (Mont 1 (<500m = Mont1 + Mont2 + Mont15); Mont 2 ([500m-600m [= Mont4 + Mont5 + Mont3); Mont 3 ([600m-700m [= Mont6 + Mont7 + Mont13); Mont 4 ([700m-800m [= Mont8 + Mont9 + Mont14); Mont 5 (> 800m = Mont10 + Mont11 + Mont12)). On each Hill, two Flanks (East and West) were chosen and constituting the secondary treatment, and on each Flank, 50mx20m transects (repetitions) were installed by Altitude level (tertiary treatment) starting with the plain, to the top of the Hill with a space of 50m between two transects. On each transect of each difference in level, all the parasitized trees or not, as well as the parasitic plants were inventoried. A total of 120 host species distributed in 34 families and 75 genera are inventoried. Combretaceae and Mimosaceae are the most represented with 13 species each, ie 38.24% for each family. Acacia is the most diverse with 10 species, ie 8.33% of the host species. 18 genera, i.e. 24% of the flora, are reported to be monospecific in this zone. In all of the 120 listed host species, 68 species or 56.66% of the host species are parasitized by 1 or 2 parasitic species and represent the first class (I) which is the class of not very sensitive host species parasitis