All Students Count Act of 2015

Amends the Elementary and Secondary Education Act of 1965 to require information on the annual state report cards on student achievement at each proficiency level to be disaggregated by the same major racial groups as the decennial census of the population. (Currently, that information is to be disaggregated by race, but the racial groups are not specified.)

Requires the proficiency information which is disaggregated by such racial groups and by ethnicity, gender, disability status, migrant status, and status as economically disadvantaged to be cross-tabulated across all of those subgroups by gender and by disability.

Provides that such disaggregation and cross-tabulation shall not be required when the number of students in a subgroup is insufficient to yield statistically reliable information or the results would reveal personally identifiable information about an individual student.