What is Megan Thee Stallion's ethnicity? This image appears in the gallery:Megan Thee Stallion: 19 facts about the rapper you need to know 5. What is Megan Thee Stallion's ethnicity? Megan Thee Stallion is African-American. [Getty] 19 images See the full gallery: Megan Thee Stallion: 19 facts about the rapper you need to know