Families indicate that fit and safety are priorities in school selections. It is not clear, however, whether school racial composition shapes families' perceptions of anticipated school belonging. Using a survey experiment with students and parents actively choosing NYC schools, I find that families expressed racialized judgments of belonging. Among schools that were otherwise similar, respondents anticipated feeling most welcome in schools with the highest proportion of their racial group and least welcome in schools with the lowest portions of their ingroup. Families' race-based assessments of school quality could be a key mechanism to explain racial segregation in school choice programs.