Солтүстік Үндістандағы Биас өзені

River in north India

The Beas River (; ) is a river in north India. The river rises in the Himalayas in central Himachal Pradesh, India, and flows for some to the Sutlej River in the Indian state of Punjab. Its total length is and its drainage basin is large. As of 2017, the river is home to a tiny isolated population of the Indus dolphin.

The river rises above sea level on the southern face of Rohtang Pass in Kullu. It traverses the Mandi District and enters the Kangra District at Sandhol, above sea level. During its lower course the Beas is crossed by numerous ferries, many of which consist of inflated skins (darais). Near Reh in Kangra District it divides into three channels, which reunite after passing Mirthal, above sea level. On meeting the Sivalik Hills in Hoshiarpur, the river sweeps sharply northward, forming the boundary with Kangra District. Then bending round the base of the Sivalik Hills, it takes the southerly direction, separating the districts of Gurdaspur and Hoshiapur. After touching the Jalandhar district for a short distance, the river forms the boundary between Amritsar and Kapurthala. Finally the Beas joins the river Sutlej at the south western boundary of Kapurthala district of Punjab after a total course of The chief tributaries are Bain, Banganga, Luni and Uhal. The Sutlej continues into Pakistani Punjab and joins the Chenab River at Uch near Bahawalpur to form the Panjnad River; the latter in turn joins the Indus River at Mithankot. The water of the Beas river is allocated to India under the terms of the Indus Waters Treaty between India and Pakistan. The mean annual flow is 14.203 million acre feet (MAF).

On 8 June 2014, 24 engineering students and one tour operator drowned when the flood gates of the Larji dam were opened.

During 2023 monsoon, flooding in Beas caused substantial damages in the state of Himachal Pradesh. Damage to the state is estimated to be $1B, the loss of life is over 400, and little government relief is available to assist with social costs and recovery.

On May 17, 2018, countless number of fishes and other aquatic animals were found dead in Beas river due to release of molasses from a sugar mill situated on its shore at Kiri Afgana village in Gurdaspur district. Locals have noted that the river color has changed to rust brown and dead fishes were floating in the river. Punjab Pollution Control Board have ordered the closure of the factory and an enquiry has been initiated. Besides sealing, the sugar mill has been charged a fine of Rs. 25 lakh for this negligence.