Kumaoni is an Indo-Aryan language spoken by over two million people of the Kumaon region of the state of Uttarakhand in northern India and parts of Doti region in Western Nepal. As per 1961 survey there were 1,030,254 Kumaoni speakers in India. The number of speakers increased to 2.2 million in 2011.

The Indo-Aryan languages are a branch of the Indo-Iranian languages in the Indo-European language family. As of the early 21st century, they have more than 800 million speakers, primarily concentrated in Bangladesh, India, Pakistan, Sri Lanka, Maldives and Nepal. Moreover, apart from the Indian subcontinent, large immigrant and expatriate Indo-Aryan–speaking communities live in Northwestern Europe, Western Asia, North America, the Caribbean, Southeast Africa, Polynesia and Australia, along with several million speakers of Romani languages primarily concentrated in Southeastern Europe. There are over 200 known Indo-Aryan languages.