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 Middle States Association of Colleges and Secondary Schools (2025-26)

For the 2025-26 school year, there are 12 private schools belonging to Middle States Association of Colleges and Secondary Schools serving 5,277 students in Delaware. You can also find more schools membership associations in Delaware.
The top ranked private schools belonging to Middle States Association of Colleges and Secondary Schools in Delaware include Red Lion Christian Academy, The Tatnall School, and Salesianum School.
The average acceptance rate is 87%, which is higher than the Delaware private school average acceptance rate of 85%.
67% of private schools belonging to Middle States Association of Colleges and Secondary Schools in Delaware are religiously affiliated (most commonly Catholic and Christian).

Top Ranked Private Schools Belonging to Middle States Association of Colleges and Secondary Schools in Delaware (2025-26)

School
Location
Quick Facts
The Hockessin Montessori School
The Hockessin Montessori School Photo
Montessori School
(1)
1000 Old Lancaster Pike
Hockessin, DE 19707
(302) 234-1240
Gr: PK-8 | 234 students Avg. class size: 20 students Tuition & acceptance rate listed
Red Lion Christian Academy
Red Lion Christian Academy Photo - ELEMENTARY PLAYGROUND
(Christian)
1390 Red Lion Road
Bear, DE 19701
(302) 834-2526
Gr: NS-12 | 1,002 student Avg. class size: 20 students Sports: 12 | Extracurrculars: 28 Tuition & acceptance rate listed
St. Annes Episcopal School
St. Annes Episcopal School Photo
(Episcopal)
(1)
211 Silver Lake Road
Middletown, DE 19709
(302) 378-3179
Gr: NS-8 | 294 students Avg. class size: 15 students Sports: 6 | Extracurrculars: 8 Tuition & acceptance rate 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
St. Elizabeth School
St. Elizabeth School Photo
(Catholic)
1500 Cedar St
Wilmington, DE 19805
(302) 656-3369
Gr: PK-12 | 433 students Avg. class size: 20 students Sports: 14 Tuition listed
Saint Mark's High School
Saint Mark's High School Photo
(Catholic)
(10)
2501 Pike Creek Road
Wilmington, DE 19808
(302) 757-8721
Gr: 9-12 | 716 students Avg. class size: 20 students Sports: 17 | Extracurrculars: 34 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
Dover First Christian School
Dover First Christian School Photo
(Christian)
(6)
655 Wyoming Ave
Dover, DE 19904
(302) 526-4998
Gr: PK-8 | 53 students Avg. class size: 12 students Sports: 1 | Extracurrculars: 3 Tuition & acceptance rate listed
Towle Institute
Alternative School (Christian)
199 Polly Drummond Hill Road
Newark, DE 19711
(302) 993-1408
Gr: 4-12 | 36 students Avg. class size: 14 students Tuition listed
Tutor Time Child Care
Alternative School
491 South Harmony Road
Newark, DE 19713
(855) 887-8945
Gr: PK-K | 142 students Avg. class size: 14 students Extracurrculars: 5 Acceptance rate listed

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