The Tatnall School Photo - Tatnall's 110-acre campus is located just west of Wilmington in Greenville, Delaware. Housing a National Wildlife Federation-accredited schoolyard habitat, five outdoor classrooms and bordering the Downs Nature Conservancy, the spacious campus provides expansive playing fields and opportunities for outdoor environmental study.

Best Delaware Private Schools Belonging to Association of Delaware Valley Independent Schools (ADVIS) (2026)

For the 2026 school year, there are 8 private schools belonging to Association of Delaware Valley Independent Schools (ADVIS) serving 3,657 students in Delaware. You can also find more schools membership associations in Delaware.
The top-ranked private schools belonging to Association of Delaware Valley Independent Schools (ADVIS) in Delaware include Tower Hill School, The Tatnall School, and The Independence School.
The average acceptance rate is 73%, which is lower than the Delaware private school average acceptance rate of 85%.
38% of private schools belonging to Association of Delaware Valley Independent Schools (ADVIS) in Delaware are religiously affiliated (most commonly Catholic).

Top-Ranked Private Schools Belonging to Association of Delaware Valley Independent Schools (ADVIS) in Delaware (2026)

School
Location
Quick Facts
Centreville Layton School
Centreville Layton School Photo - Beautiful campus
Alternative School
6201 Kennett Pike
Wilmington, DE 19807
(302) 571-0230
Gr: K-12 | 97 students Avg. class size: 8 students Sports: 6 Tuition & acceptance rate listed
Archmere Academy
Archmere Academy Photo
(Catholic)
(7)
3600 Philadelphia Pike
Claymont, DE 19703
(302) 798-6632
Gr: 9-12 | 501 students Avg. class size: 15 students Sports: 20 | Extracurrculars: 38 Tuition listed
The Independence School
The Independence School Photo
(2)
1300 Paper Mill Road
Newark, DE 19711
(302) 239-0332
Gr: NS-8 | 470 students Avg. class size: 19 students Sports: 11 | Extracurrculars: 13 Tuition listed
St. Edmond's Academy
St. Edmond's Academy Photo
All-boys (Catholic)
2120 Veale Rd
Wilmington, DE 19810
(302) 475-5370
Gr: PK-8 | 162 students Avg. class size: 14 students Sports: 9 | Extracurrculars: 16 Tuition listed
Salesianum School
Salesianum School Photo
All-boys (Catholic)
(1)
1801 N Broom Street
Wilmington, DE 19802
(302) 654-2495
Gr: 9-12 | 930 students Avg. class size: 18 students Sports: 21 | Extracurrculars: 60 Tuition & acceptance rate listed
The Tatnall School
The Tatnall School Photo - Tatnall's 110-acre campus is located just west of Wilmington in Greenville, Delaware. Housing a National Wildlife Federation-accredited schoolyard habitat, five outdoor classrooms and bordering the Downs Nature Conservancy, the spacious campus provides expansive playing fields and opportunities for outdoor environmental study.
(13)
1501 Barley Mill Road
Wilmington, DE 19807
(302) 892-4296
Gr: NS-12 | 486 students Avg. class size: 12 students Sports: 15 | Extracurrculars: 9 Tuition listed
Tower Hill School
Tower Hill School Photo - Tower Hill School resides on a 44-acre campus with state-of- the-art athletic facilities and impressive academic and arts areas.
2813 W 17th Street
Wilmington, DE 19806
(302) 575-0550
Gr: NS-12 | 849 students Avg. class size: 15 students Sports: 17 | Extracurrculars: 24 Tuition & acceptance rate listed
Wilmington Montessori School
Wilmington Montessori School Photo - Primary (3- to 6-year-old) Program - Preschool and Kindergarten - Students work together to create the Montessori Pink Tower.
Montessori School
(1)
1400 Harvey Road
Wilmington, DE 19810
(302) 475-0555
Gr: NS-8 | 162 students Avg. class size: 13 students Sports: 2 | Extracurrculars: 13 Tuition listed

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