A checklist of 237 species of orchids recorded from the state of Uttarakhand, India, is provided. Of these 127 are terrestrial, 99 epiphytic and 11 saprophytic. The present study shows that Poneorchis nana (King & Pantl.) Soo is a new record for Uttarakhand. Bulbophyllum secundum Hook. and Eulophia hormusjii Duthie that have earlier been merged into other species, during the present study after detailed scrutiny, have been treated as separate species. Androcorys pugioniformis (Lindl. ex Hook. f.) K.Y. Lang. has been rediscovered after a century gap. Nomenclature has been updated as far as possible with the help of available recent taxonomic literature.