You can pull data together from
https://www.p12.nysed.gov/irs/statis...taff/home.html
and
https://www.p12.nysed.gov/irs/statistics/nonpublic/
to see where people send kids to private school and where they don't.
Edgemont has only 3% going to private school. But that's likely because this place has no other cachet to it so everyone is here for the schools.
Scarsdale + Bronxville (ones I looked at) are higher despite being widely recognized as excellent school districts. Likely because they have name cachet and maybe people go there for the neighborhood and use a different heuristic for schools.