Jaunsari (Devanagari: जौनसारी) is a Western Pahari language of northern India spoken by the Jaunsari people in the Kalsi, Chakrata and Tyuni sub-districts of Dehradun district in the Garhwal region of Uttarakhand state.
The dialects of Jaunsari share about 60% of their basic vocabulary with each of the neighbouring varieties of Bangani, Jaunpuri, Nagpuriya and Sirmauri.