#25 Best Private Schools in New Castle County, DE
Immaculate Heart of Mary
Diocesan school · Grades Pre-K–8
Serving families in Wilmington since at least 2011
Wilmington, DE
B-Overall grade406 students16 students per teacher
2026 lists
Best Private Schools in New Castle County, DE
Private schools in New Castle County, DE with the highest overall grades. Top 27 of 27 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.