The Orchids of Uttarakhand is a first-of-its kind, lavishly illustrated field guide that provides a comprehensive photographic account of the orchid diversity of the Himalayan state of Uttarakhand. It has been especially designed for nature lovers, students, researchers, and field foresters who are keen to explore different areas of Uttarakhand. It is the outcome of detailed eco-floristic studies and careful observations on the orchids and their habitats in the state made by the authors for over 20 years. The field guide provides basic information on the orchids, a brief history of orchid surveys in the state, orchid rich areas in the state, their biological and ecological significance, and current threats. Detailed information has been given on two orchid-rich localities in the state, viz., Gori Valley in Pithoragarh district and Mandal area in Chamoli district. For each species, its scientific name, along with the local name and short descriptions, have been given in a simple language for easy understanding. This book is very comprehensive yet easy to use for beginners and experts alike. Of the total 244 orchid species reported so far from the state of Uttarakhand, 227 species have been described in detail in the book, along with over 800 photographs, their status and distribution in the state, flowering period, habitat, and maps showing their potential distribution. Field characters have been given in simple language. An appendix has been provided listing all 244 orchid species along with their current synonyms, status in the world, status in India, and brief remarks, if any. Besides documenting orchid diversity and generating awareness about the intricate relationship between orchids and their environment, this field guide aims to sensitise the general public towards the conservation of these noble plants. The authors urge the readers, especially students of botany and researchers, to abstain from over collecting orchid specimens. Please remember that, in the name of research and plant collection , you may be decimating the sole population of an endangered orchid from its habitat!.