--- - |2 Abstract The current study examined whether children in elementary school in the United States held stereotypes and prejudicial attitudes about Arab Muslims relative to other groups. Children (n = 136), ages 6–11 (55 boys, 81 girls), were read three counterbalanced vignettes about different immigrant families who moved to the United States: one family from the Middle East with clothing markers indicating they are Muslim (e.g., hijab), one family from the Middle East without clothing markers indicating religion, and one White family from Ireland. Children's responses indicated stereotypes associating the Arab Muslim male target as more anti‐American and hostile and the Arab Muslim female target as more oppressed than others, both consistent with prevalent media stereotypes. Children's positive and negative affective intergroup attitudes were also measured, along with their attitudes about who can be an “American,” with children showing both a positivity and negativity bias against Arab Muslims. Children who had some contact with Muslims or were familiar with Islam felt more positively toward Arab Muslims than less informed children. In addition, if children perceived Arab Muslims to be prototypical “Americans,” and identified as very American themselves, they also held positive attitudes toward Arab Muslims. Implications for prejudice reduction interventions are discussed. - Analyses of Social Issues and Public Policy, Volume 17, Issue 1, Page 60-83, December 2017.