Belousov (or Beloussov) is a Russian surname formed from the nickname Belye Usy (Russian: Белые Усы) meaning "White Moustache", and in the patronymic form. The English equivalent would be "Grey Moustache", inferring to someone older and grey-haired, i.e. wise". The feminine form of the surname is Belousova. The Ukrainian language name of the same derivation is Bilous in the non-patronymic form.
The surname Belousov may refer to:
Boris Pavlovich Belousov, Soviet chemistBoris Nikolayevich Belousov, Soviet cosmonautLeonid Belousov, midfielder for FC Gornyak UchalyLudmila Belousova (born 1935), Russian figure skaterVladimir Belousov (1907–1990), Soviet geologistVladimir Belousov (ski jumper) (born 1946), Soviet ski jumperYuri Leonidovich Belousov (1945–2000), Soviet and Russian researcher and engineerIrina Belousova (born 1954), Ukrainian politicianPatricija Belousova (born 1995), Lithuanian dancer and beauty pageantSonya Belousova (born 1990), Russian-born composer, pianist and recording artistYaroslav Belousov (born 1991), a Russian political prisoner