Kumharsain was a princely state of the British Raj, located in modern-day Himachal Pradesh. It was one of the several states of the Punjab States Agency.
The state of Kumharsain was founded in the 15th century. It was occupied by Nepal from 1803 to 1816 and by British India from 1839 to 1840. The rulers of the state used the title of 'Rana'.