#1 Best Private High Schools in Allegheny County, PA
Oakland Catholic High School
Diocesan school · Grades 9–12
The smallest classes of any Catholic school in Pittsburgh
Pittsburgh, PA
A+Overall gradeAll girls400 students10 students per teacher
2026 lists
Best Private High Schools in Allegheny County, PA
Private high schools in Allegheny County, PA with the highest overall grades. Top 20 of 20 schools.
#2 Best Private High Schools in Allegheny County, PA
Ellis School
Independent school · Grades Pre-K–12
100% of graduates go to four-year colleges
Pittsburgh, PA
A+Overall gradeAll girls367 students6 students per teacher
#3 Best Private High Schools in Allegheny County, PA
Serra Catholic High School
Diocesan school · Grades 9–12
Smaller classes than 77% of Catholic schools in Pennsylvania
McKeesport, PA
A+Overall grade209 students10 students per teacher
#4 Best Private High Schools in Allegheny County, PA
St. Joseph High School
Diocesan school · Grades 9–12
Smaller classes than 82% of Catholic schools in Pennsylvania
Natrona Heights, PA
A+Overall grade126 students9 students per teacher
#5 Best Private High Schools in Allegheny County, PA
Bishop Canevin High School
Diocesan school · Grades 9–12
The smallest classes of any Catholic school in Pittsburgh
Pittsburgh, PA
A+Overall grade204 students10 students per teacher
#6 Best Private High Schools in Allegheny County, PA
Sewickley Academy
Independent school · Grades Pre-K–12
The only independent school in Sewickley
Sewickley, PA
A+Overall grade445 students7 students per teacher
#7 Best Private High Schools in Allegheny County, PA
Central Catholic High School
Diocesan school · Grades 9–12
The largest Catholic school in Pittsburgh
Pittsburgh, PA
A+Overall gradeAll boys712 students12 students per teacher
#8 Best Private High Schools in Allegheny County, PA
Winchester Thurston School
Independent school · Grades Pre-K–12
The only independent school in Allison Park
Allison Park, PA
A+Overall grade645 students9 students per teacher
#9 Best Private High Schools in Allegheny County, PA
Seton Lasalle Catholic High School
Diocesan school · Grades 9–12
86% of graduates go to four-year colleges
Pittsburgh, PA
A-Overall grade433 students12 students per teacher
#10 Best Private High Schools in Allegheny County, PA
Shady Side Academy
Independent school · Grades Pre-K–12
One of the 3 largest independent schools in Pennsylvania
Pittsburgh, PA
A-Overall grade1,118 students8 students per teacher
#11 Best Private High Schools in Allegheny County, PA
Our Lady of the Sacred Heart High School
Independent Catholic school · Grades 9–12
94% of graduates go to four-year colleges
Coraopolis, PA
A-Overall grade335 students11 students per teacher
#12 Best Private High Schools in Allegheny County, PA
Shady Side Academy
Independent school · Grades Pre-K–12
One of the 3 largest independent schools in Pennsylvania
Pittsburgh, PA
B+Overall grade1,118 students21 students per teacher
#13 Best Private High Schools in Allegheny County, PA
Eden Christian Academy
Christian school (nondenominational) · Grades K–12
The largest Christian school in Pittsburgh
Pittsburgh, PA
BOverall grade643 students11 students per teacher
#14 Best Private High Schools in Allegheny County, PA
Yeshiva Girls School
Jewish day school · Grades K–12
100% of graduates go to four-year colleges
Pittsburgh, PA
BOverall gradeAll girls156 students7 students per teacher
#15 Best Private High Schools in Allegheny County, PA
Imani Christian Academy
Christian school (nondenominational) · Grades Pre-K–12
Smaller classes than 78% of Christian schools in Pennsylvania
Pittsburgh, PA
BOverall grade149 students7 students per teacher
#16 Best Private High Schools in Allegheny County, PA
Trinity Christian School
Christian school (nondenominational) · Grades K–12
90% of graduates go to four-year colleges
Wilkinsburg, PA
BOverall grade449 students14 students per teacher
#17 Best Private High Schools in Allegheny County, PA
Harvest Baptist Academy
Baptist school · Grades K–12
Growing: enrollment up 106% since 2011–12
Natrona Heights, PA
BOverall grade298 students11 students per teacher
#18 Best Private High Schools in Allegheny County, PA
Nazareth Prep High School
Independent Catholic school · Grades 9–12
A Catholic school in Emsworth
Emsworth, PA
B-Overall grade104 students15 students per teacher
#19 Best Private High Schools in Allegheny County, PA
Redeemer Lutheran School
Lutheran (Missouri Synod) school · Grades Pre-K–12
Growing: enrollment up 76% since 2011–12
Verona, PA
B-Overall grade202 students13 students per teacher
#20 Best Private High Schools in Allegheny County, PA
Grace Non-Traditional Christian Academy
Alternative school · Grades 9–12
One of the most diverse private schools in Pennsylvania
Pittsburgh, PA
B-Overall grade407 students
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.