#25 Best Private High Schools in Harris County, TX
The Post Oak School
Montessori school · Grades Pre-K–12
One of the 3 largest Montessori schools in Texas
Houston, TX
AOverall grade340 students9 students per teacher
2026 lists
Best Private High Schools in Harris County, TX
Private high schools in Harris County, TX with the highest overall grades. Top 50 of 50 schools.
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.