For the 2026 school year, there are 8 private high schools belonging to National Association of Independent Schools (NAIS) serving 4,374 students in Delaware. You can also find more schools membership associations in Delaware.
The top-ranked private high schools belonging to National Association of Independent Schools (NAIS) in Delaware include Wilmington Friends School, Tower Hill School, and Sanford School.
The average acceptance rate is 76%, which is lower than the Delaware private high school average acceptance rate of 87%.
Top-Ranked Private High Schools Belonging to National Association of Independent Schools (NAIS) in Delaware (2026)
School
Location
Quick Facts
Centreville Layton School ![Centreville Layton School Photo - Beautiful campus]( "Centreville Layton School Photo - Beautiful campus")
Alternative School
6201 Kennett Pike
Wilmington, DE 19807
(302) 571-0230
Wilmington, DE 19807
(302) 571-0230
Gr: K-12 | 97 students Avg. class size: 8 students Sports: 6 Tuition & acceptance rate listed
101 School Road
Wilmington, DE 19803
(302) 576-2900
Wilmington, DE 19803
(302) 576-2900
Gr: NS-12 | 707 students Avg. class size: 12 students Sports: 14 | Extracurrculars: 39 Tuition listed
3600 Philadelphia Pike
Claymont, DE 19703
(302) 798-6632
Claymont, DE 19703
(302) 798-6632
Gr: 9-12 | 501 students Avg. class size: 15 students Sports: 20 | Extracurrculars: 38 Tuition listed
St. Andrew's School
(Episcopal)
350 Noxontown Rd
Middletown, DE 19709
(302) 285-4231
Middletown, DE 19709
(302) 285-4231
Gr: 9-12 | 315 students Sports: 15 Tuition listed
2501 Pike Creek Road
Wilmington, DE 19808
(302) 757-8721
Wilmington, DE 19808
(302) 757-8721
Gr: 9-12 | 716 students Avg. class size: 20 students Sports: 17 | Extracurrculars: 34 Tuition listed
6900 Lancaster Pike
Hockessin, DE 19707
(302) 235-6503
Hockessin, DE 19707
(302) 235-6503
Gr: NS-12 | 703 students Avg. class size: 13 students Sports: 16 Tuition listed
1501 Barley Mill Road
Wilmington, DE 19807
(302) 892-4296
Wilmington, DE 19807
(302) 892-4296
Gr: NS-12 | 486 students Avg. class size: 12 students Sports: 15 | Extracurrculars: 9 Tuition listed
2813 W 17th Street
Wilmington, DE 19806
(302) 575-0550
Wilmington, DE 19806
(302) 575-0550
Gr: NS-12 | 849 students Avg. class size: 15 students Sports: 17 | Extracurrculars: 24 Tuition & acceptance rate listed
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