Afghanistan (P), Bangladesh, Belarus (B), Bhutan, Estonia (B), Finland (B), India, Iran [Islamic Republic of] (B), Kazakhstan (B), Kyrgyzstan (B), Latvia (B), Lithuania (B), Mongolia (B), Myanmar, Nepal, Pakistan, Russia (Asian) (B), Russia (Central Asian) (B), Russia (European) (B), Sri Lanka, Sweden (B), Tajikistan (B), Turkmenistan (B), Uzbekistan (B).
Vagrant to Bahrain, Belgium, Bulgaria, Cyprus, Denmark, France, Germany, Gibraltar, Hong Kong (China), Ireland, Israel, Italy, Jordan, Kuwait, Malta, Netherlands Antilles, Nigeria, Norway, Oman, Romania, Spain, Switzerland, Syrian Arab Republic, United Arab Emirates, United Kingdom.
Breeds in eastern Europe (mainly southern Finland, Baltic States, Belarus) east to central Russia (upper R Lena and south-eastern Altai), south to northern Afghanistan. Non-breeding southern and eastern Indian Subcontinent and Myanmar.
 
Population
Estimated population is 10,000,000 - 50,000,000 (2010).
Blyth's Reed Warbler (Acrocephalus dumetorum) [XC813791]
by Albert Lastukhin from Bergsg\u00e5rden,Falun Municipality, Dalarna County, Russian Federation (alarm call)
Blyth's Reed Warbler (Acrocephalus dumetorum) [XC519730]
by Leif Arvidsson from V\u00e4ndra, P\u00f5hja-P\u00e4rnumaa Rural Municipality, P\u00e4rnu maakond, Sweden (song)