Afghanistan (B), China (mainland), India, Kazakhstan (B), Kyrgyzstan (B), Mongolia (B), Myanmar, Nepal, Pakistan, Russia (Asian), Russia (Central Asian) (B), Tajikistan (B), Turkmenistan (B), Uzbekistan.
Breeds south-eastern Kazakhstan (Kharkaralinsk, Tarbagatai, Dzungarian Ala Tau) and Tien Shan east to the Altai and north-western and central China (east to Qilian Mts, in Qinghai), south to Tajikistan (Pamirs), north-eastern Afghanistan and western Himalayas in north-eastern Pakistan (Baluchistan), Kashmir (western Karakorum) and north-western India (Himachal Pradesh). Non-breeding central India (Rajasthan, Madhya Pradesh and Bengal south to Maharashtra and northern Andhra Pradesh).
 
Population
Estimated population is unknown (2010).
Sulphur-bellied Warbler (Phylloscopus griseolus) [XC813606]
by Sandip das from Issyk Kul, Kyrgyzstan (song)
Sulphur-bellied Warbler (Phylloscopus griseolus) [XC35291]
by Sebastian Klein from Below Bolshoye Almatinskoye Ozero, Ile Alatau State National Park, Kazakhstan (song)