#1 Best Private High Schools in Buffalo, NY
Mount St. Mary Academy
Independent Catholic school · Grades 9–12
The smallest classes of any Catholic school in Buffalo
Buffalo, NY
A+Overall gradeAll girls216 students8 students per teacher
2026 lists
Best Private High Schools in Buffalo, NY
Private high schools in Buffalo, NY with the highest overall grades. Top 6 of 6 schools.
#2 Best Private High Schools in Buffalo, NY
Mount Mercy Academy
Independent Catholic school · Grades 9–12
Smaller classes than 86% of Catholic schools in New York
Buffalo, NY
A+Overall gradeAll girls180 students8 students per teacher
#3 Best Private High Schools in Buffalo, NY
Buffalo Seminary
Independent school · Grades 9–12
95% of graduates go to four-year colleges
Buffalo, NY
A+Overall gradeAll girls149 students6 students per teacher
#4 Best Private High Schools in Buffalo, NY
Bishop Timon-St. Jude High School
Independent Catholic school · Grades 9–12
Smaller classes than 64% of Catholic schools in New York
Buffalo, NY
AOverall gradeAll boys279 students11 students per teacher
#5 Best Private High Schools in Buffalo, NY
St. Josephs Collegiate Institute
Independent Catholic school · Grades 9–12
The largest Catholic school in Buffalo
Buffalo, NY
B+Overall gradeAll boys647 students14 students per teacher
#6 Best Private High Schools in Buffalo, NY
Nichols School
Independent school · Grades 5–12
87% of graduates go to four-year colleges
Buffalo, NY
BOverall grade582 students8 students per teacher
Grades compare each school's official facts, such as class size, how long it has served families and where graduates go, with similar schools. They're a starting point: visit, ask questions and trust what you see.