Brunei Darussalam, Cambodia, China (mainland), Hong Kong (China), Indonesia, Japan, Laos, Malaysia, North Korea, Philippines, Russia (Asian), Russia (Central Asian) (B), Singapore, South Korea, Taiwan (China), Thailand, USA, Vietnam.
Breeds south-central and south-eastern Siberia, northern Mongolia, north-eastern China (Inner Mongolia and Manchuria), northern Korea, Russian Far East and Sakhalin I. Non-breeding south-eastern China (Guangxi, Guangdong, Hainan), south-eastern Asia, Greater Sundas, Philippines and Sulawesi.
 
Population
Estimated population is unknown (2010).
Mugimaki Flycatcher (Ficedula mugimaki) [XC793250]
by Oriental Stork from Gunung Alab Tambunan Substation, Crocker Range National Park, Sabah, Malaysia (call)
Mugimaki Flycatcher (Ficedula mugimaki) [XC405148]
by Jungmoon Ha from Muchinka, Russian Federation (song)