National Highway 21 (NH 21) is a primary national highway in India. This highway connects Jaipur in Rajasthan to Agra and Bareilly in Uttar Pradesh This national highway is long starting from Patrika Chowk in Jaipur till its end at Lalpur Chauraha in Bareilly.
The Jaipur to Agra section of NH 21 was known as NH 11 before renumbering of all national highways by the Ministry of Road Transport and Highways in 2010.