Age-related differences in explicit and implicit racial biases in Black Cameroonians (N = 187, 94 females) were investigated using a cross-sectional design. Participants ranged in age from 3 to 30 years, and were from middle-to-high income families in Yaoundé, Cameroon. Biases were assessed by comparing attitudes toward Blacks with those toward Whites and Chinese. Implicit pro-Black/anti-other-race (White and Chinese) biases were present at age 4, in contrast to anti-Black/pro-other-race biases, which were observed among 9- to 30-year-olds. In addition, explicit pro-Black/anti-other-race biases that were present at age 4 were no longer evident by age 7. These findings provide a detailed picture of age-related differences in racial biases in an understudied part of the world that can inform theories regarding the development of racial biases, as well as efforts to reduce such biases.