Birtaniya ta Yamma ta kasance abin tarihi ga rukunin gungun Turawan mulkin mallaka na Birtaniyya a yammacin Afirka, da suka hada da Gambia, Saliyo, Ghana, da Najeriya, wadanda gwamnatin mulkin mallaka ta Birtaniyya ta gudanar a matsayin guda daya daga karshen karni na 19. har zuwa tsakiyar karni na 20.
