Rhenock (Nepali: रिनाक ) is a small town in East district in the Indian state of Sikkim, located at . It lies 63 kilometres east of Gangtok on the way to Jelepla Pass at an altitude of 1,040. The word Rhe-nock (in Lepcha dialect) means Black Hill. Situated in the extreme east of Sikkim, Rhenock witnessed the establishment of first police out post in the state, which is the historical event.