Ethnobotany is a distinct branch of natural science dealing with various aspects such as anthropology, archaeology, botany, ecology, economics, and medicine, religious, cultural and several other disciplines. Ethnobotany is usually defined as anthropological approach to botany. There are several methods of ethnobotanical research and those relevant to medicinal plants are archaeological search in literature, herbaria and the field studies. Recently ethno-botanical studies have gained importance during recent years. In the present research ethnobotanical studies have been conducted on some plants of Haryana. Yamuna Nagar district of Haryana is very less explored for ethnobotanical studies. Therefore many survey of Yamuna Nagar district have been conducted for the documentation of ethnobotanical data and exploration of floristic diversity during the year 2011-2012.Field surveys were carried out throughout the district to collect ethnobotanical data (traditional use of plants, local name, plant parts used, medicinal value). Over all 73 species of flowering plants were collected during the field survey, out of which 46 species of ethnobotanical value belonging to 42 genera and 26 families have been recorded.