Mu River (Burmese: မူးမြစ်; MLCTS: mu: mrac; IPA: [mú mjɪʔ]) is a river in upper central Myanmar (Burma), and a tributary of the country's chief river the Ayeyarwady. It drains the Kabaw valley and part of the Dry Zone between the Ayeyarwady to the east and its largest tributary Chindwin River to the west, flows directly north to south for about 275 km (171 mi) and enters the Ayeyarwady west of Sagaing near Myinmu. The wooded upper Mu valley is populated by the Kadu and Kanan minorities whereas the fertile lower valley constitutes part of the heartlands of the ethnic majority Bamar.