: Backgroud: The development of an ethnobotanical research for medicinal plants enables the characterization of botanical knowledge which includes the plants, plants parts used, method of preparation and method of administration of the drug. Variety of plant species from different families are used in the treatment of asthma in north-western part of Nigeria. A collection of these medicinal plants was developed. The collection provide readily available data for traditional herbal practitioners, researchers, asthmatic patients and other groups with interest in traditional healing methods for asthma. Method: The data were obtained from recognized local traditional knowledge, scientific literatures, asthmatic patients, plant taxonomists/botanists, based on semi structured questionnaires and authentication was followed in the herbarium of Department of Biological Sciences, Ahmadu Bello University Zaria - Nigeria. Important information like family names, common names, plant parts used and methods of administration and frequency of mentioning (citation) by the study groups were reported. Results: A collection of eighty two (82) medicinal plants, belonging to fifity two (52) Families, with their common names, local names, different plant parts used, various solvents for preparation, modes of administrations and frequency of citation by the various study groups were documented. Anogeissus leiocarpus (38.10%), Allium sativa (37.17%), Zingiber officinale (33.49%), Carum carvi (18.42%), Syzigium aromaticum (18.38%), Securidaca longipenduculata (16.91%) among others. The most predominant family was Fabaceae with 14 species followed by Bursearceae, Combretaceae and Euphorbiaceae with 4 species. The leaves were the most predominant part utilized, with water as the most common solvent for preparation and oral route of administration Conclusion: A collection of medicinal plants identified to be widely used in managing asthma in North-western Nigeria was developed

Keywords: Ethnobotanical survey, medicinal plants, asthma, North-western Nigeria