#1 Best Private High Schools in Erie County, 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 Erie County, NY
Private high schools in Erie County, NY with the highest overall grades. Top 11 of 11 schools.
#2 Best Private High Schools in Erie County, 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 Erie County, NY
Cardinal O'Hara High School
Independent Catholic school · Grades 9–12
Smaller classes than 83% of Catholic schools in New York
Tonawanda, NY
A+Overall grade181 students9 students per teacher
#4 Best Private High Schools in Erie County, 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
#5 Best Private High Schools in Erie County, NY
Christian Central Academy
Christian school (nondenominational) · Grades Pre-K–12
The only Christian school in Williamsville
Williamsville, NY
AOverall grade220 students8 students per teacher
#6 Best Private High Schools in Erie County, 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
#7 Best Private High Schools in Erie County, NY
The Park School of Buffalo
Alternative school · Grades Pre-K–12
Smaller classes than 60% of independent schools in New York
Snyder, NY
A-Overall grade236 students5 students per teacher
#8 Best Private High Schools in Erie County, 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
#9 Best Private High Schools in Erie County, NY
St. Marys High School
Independent Catholic school · Grades 9–12
95% of graduates go to four-year colleges
Lancaster, NY
B+Overall grade406 students13 students per teacher
#10 Best Private High Schools in Erie County, NY
Nichols School
Independent school · Grades 5–12
87% of graduates go to four-year colleges
Buffalo, NY
BOverall grade582 students8 students per teacher
#11 Best Private High Schools in Erie County, NY
St. Francis High School
Independent Catholic school · Grades 9–12
96% of graduates go to four-year colleges
Hamburg, NY
BOverall gradeAll boys416 students15 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.