This paper uses evidence from Durham, North Carolina to examine the impact of school choice on racial and class-based segregation across schools. The findings suggest that school choice increases segregation. Furthermore, the effects of choice on segregation by class are larger than the effects on segregation by race. These results are consistent with the theoretical argument-developed in sociology and economics literature-that the segregating choices of students from advantaged backgrounds are likely to outweigh any integrating choices by disadvantaged students.