Online racial discrimination experiences often reflect attacks on the humanity and intelligence of members of specific racial groups (e.g., African Americans and Latinos). Such experiences may have detrimental effects on academic outcomes over time. Changes in reports of online racial discrimination and academic motivation were examined among a sample of 418 African American (n = 257) and Latino (n = 161) youth in Grades 6-12. Latent growth models with parallel processes revealed that adolescents reported increases in online racial discrimination over time yet relative stability in academic motivation. Elevated rates of online racial discrimination were related to decreases in adolescents' academic motivation. This was the case even after adjusting for teacher discrimination and baseline grade point average. In addition, high initial levels of academic motivation were related to increases in adolescents' reports of online racial discrimination. Findings highlight the importance of understanding racial discrimination in online contexts when examining how race-related experiences affect the academic adjustment of adolescents of color.