The biodiversity of medicinal plants is abundant in Jharkhand. Of Jharkhand's entire land, around 40% is covered by forests. There are 32 tribal communities in Jharkhand. According to traditional knowledge, they treat a variety of illnesses with medicinal plants. The primary healthcare provider in rural Jharkhand refers to traditional healers as vaidyas. The locals rely on plant resources for a variety of uses, including fuel, feed, medicine, fiber, and lumber. The local indigenous populations are familiar with the custom of using plants as medicine. These people typically rely on herbs and other things to treat illnesses when they don't have access to modern facilities. A total of 118 species of medicinal plants like trees, shrubs, herbs, and grasses belonging to 51 families and 97 genera were found during the course of this study and were frequently utilized by the locals to treat a variety of illnesses. Whole plants, leaves, stems, roots, tubers, bark, flowers, fruits, and seeds were among the several plant parts that were utilized. The traditional and ethnic knowledge derived from these leads has been crucial in the discovery of new products and the development of fresh concepts about the preservation of natural resources. The goal of this paper is to list the significant biodiversity of medicinal plants which is used by the local people and tribal people of Hazaribag.