#25 Best Private Schools in the Archdiocese of Boston
St. Agnes School
Diocesan school · Grades Pre-K–8
Smaller classes than 64% of Catholic schools in Massachusetts
Arlington, MA
A+Overall grade291 students10 students per teacher
2026 lists
Best Private Schools in the Archdiocese of Boston
Private schools in the Archdiocese of Boston with the highest overall grades. Top 50 of 79 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.