Ambesse Tolosa (an haife shi a ranar 28 ga watan Agusta 1977 a Shewa) ɗan wasan tsere ne na Habasha, wanda ya kware a tseren marathon.
Tolosa ya gwada ingancin haramtattun abubuwa a cikin watan Fabrairu 2008 kuma ya sami haramcin shekaru biyu daga wasannin motsa jiki. Abun da ke cikin tsarinsa (morphine) ba magani bane mai kara kuzari kuma Tolosa ya ce bai san yadda ya shiga jikinsa ba, amma dokokin IAAF sun bayyana cewa 'yan wasa sun karbi haramcin ba tare da la'akari da niyyar ba. [1] Sakamakonsa daga 9 watan Disamba 2007 zuwa gaba an soke shi, [2] wanda ya haɗa da nasararsa a Marathon Honolulu a waccan shekarar.