This paper presents the result of a study on the diversity of different plant species habit and their occurrence found in Sharis valley of Hajjah governorate in Yemen. This study is first of its kind conducted in the district showing current status of the plant diversity. In present study, a total of 298 plant species belonging to 219 genera under 75 families have been recorded from this area. The study also acknowledge the ecological balance is being disturbed due to the very quickly rise in the human population and their increased demand for more utilization of natural resources. Therefore the proper knowledge of plant diversity could play important role in planning for conservation and sustainable use of available resources. In the study area, there 10 dominant families according to the number of species collected are: Asteraceae is represented by the highest number of species (34 species, 28 genera) followed by Fabaceae (26 species, 17 genera), Poacese (16 species, 13 genera), Euphorbiaceae (16 species, 6 genera), Lamiaceae (14 species, 9 genera), Solanaceae (12 species, 8 genera), Acanthaceae (11 species, 9 genera), Asclepiadaceae (8 species, 7 genera), Amaranthaceae (8 species, 6 genera), and Apocynaceae (5 species, 4 genera).