Delphian School

20950 SW Rock Creek Road
Sheridan, OR 97378
Tel: 800-626-6610
Gr: (Boarding) 3-12 | 271 students
Delphian School’s mission is to empower young people with effective study skills, a solid academic foundation, a strong sense of personal integrity and a wide range of abilities.
More broadly, its mission is to send forth responsible, capable individuals who can help build a better world.

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Definition of Terms 
2015 School Data
Delphian School Boarding School Avg.
School Focus College Preparatory College Preparatory
Grades Offered (Boarding) 3-12 11-12
Grades Offered (Day) K-12 7-12
School Type Co-ed Co-ed
ADD/ADHD Support No No
Religious Affiliation Non-denominational Non-denominational
Year Founded 1976 1910
Campus Size 800 acres 121 acres

Student Body

Enrollment 271 students 300 students
% Students of Color 16% 20%
% International Students 32% 20%
% Students Boarding 75% 67%
Average SAT Score 1860 * National Avg. »View
SAT range (25th-75th percentile) 1640 - 1930 -
Offers Post-Grad Year No No

Academics and Faculty

Saturday Classes No No
Classroom Dress Code Casual Casual
Average Class Size 15 students 12
*National School Avg. » 20
Teacher:Student Ratio 1:7 1:7
# of AP/Advanced Courses Offered 9 16
ESL Courses Offered Yes Yes
Summer Program Offered Yes Yes


Yearly Tuition
(Boarding Students)
$45,940 $49,500
Yearly Tuition
(Day Students)
$27,525 $28,400
Tuition international students $49,450 $46,300
% Students on Financial Aid 35% 35%
Merit Scholarships Offered No No


Application Deadline None / Rolling Jan. 15
SSAT Required No Yes
Director of AdmissionsMarti Wiggins

Course Listings

List of Courses Offered Link to List of Courses

AP / Advanced Courses

# of AP/Advanced Courses Offered 9 16
CoursesCalculus AB, Calculus BC, English Language, English Literature, French Language and Culture, Macro Economics, Micro Economics, Physics B, Spanish Language


# Interscholastic Sports Offered 6 14
SportsBaseball, Basketball, Soccer, Softball, Tennis, Volleyball


Total Extracurricular Organizations 23 24
ExtracurricularsArchery Club, Audio/Visual Class, Boy Scouts of America/Cub Scouts of America, Ceramics, Chess Club, Choir, Cooking Club, Drama, Drawing and Painting, Guitar, International Club, Intramural Basketball, Intramural Soccer, Intramural Volleyball, Jazz Choir, Music, Photography & Darkroom Editing, Space Club, Student Council, Weightlifting, Woodshop, Writing and Poetry, Yoga

College Matriculation

Year: - 10 Most Popular College Choices  (# Enrolled)
Link to Matriculation Data

School Notes:

  • Delphian School, is an independent, K-12, co-educational day and boarding school located in Sheridan, Oregon. Delphian enrolls students from around the world.

    Delphian was founded in 1976 by a group of educators concerned about the decline in the standards of American education. Delphian curriculum integrates innovative study methods recognized worldwide as a breakthrough in education. By learning how to study, without memorization or memory tricks, students develop the confidence and knowledge to tackle the most challenging subjects independently.

    Delphian's student body takes a highly active role in all school activities, giving each student the opportunity learn his own lessons about responsibility, integrity, and leadership.

    Most Delphian School graduates are accepted at top ranked colleges and universities across the United States. 

    Delphian School is an accredited member school of the Northwest Accreditation Commission (NWAC), the Northwest Association of Independent Schools (NWAIS) and The Association of Boarding Schools (TABS). Delphian is registered with the Oregon Department of Education and is a member of the Oregon Federation of Independent Schools.
    The school has 760 acres of wooded hills, meadows and fields overlooking the scenic Willamette Valley, heart of Oregon's wine country, and the coastal mountain range. 

    Delphian School's sports facilities include a double-court gymnasium, soccer fields, baseball and softball diamonds, a racquetball court, running track, yoga studio, four lighted tennis courts, and a weight and exercise room.

  • School accreditations: Northwest Accreditation Commission (NWAC), Northwest Association of Independent Schools (NWAIS), The Association of Boarding Schools (TABS)
  • Sample of notable school alumni/alumnae:
    • Sky Dayton - Founder of EarthLink and founder and chairman of Boingo Wireless, and a technology investor/entrepreneur.
    • Thad Corea - Drummer (Wild Colonials; Blue Man Group); Jaguar Recording Studio
    • Arwen Dayton - Author
    • Natasha Gray - Artist/sculptor
    • Vivian Gray - Actress (Dread)
    • Sylvan Lionni - Artist
    • Melissa McPhail - Author
    • David O'Donnell - Actor/producer/writer: Air Force One; NCIS; Days of Our Lives
    • Eduardo Olmos - Mayor of Torreon, Coahuila, Mexico
    • Doug Rappoport - Lead guitarist (Edgar Winter)

Nearby Schools:

The nearest boarding school is Western Mennonite School (17.8 miles away)
  • School Location Miles Grades Students
  • 17.8 mi | Gr. 6-12 | 200 students9045 Wallace Rd NW
    SalemOR 97304
    503-363-2000 x121
  • 41.7 mi | Gr. Pre-K-12 | 860 students6300 SW Nicol Road
    PortlandOR 97223
  • 156.5 mi | Gr. 9-12 | 192 students827 N. Tacoma Avenue
    TacomaWA 98403
    (253) 284-8600
  • 181.1 mi | Gr. 6-12 | 508 students1415 Summit Avenue
    SeattleWA 98122
  • 231.1 mi | Gr. K-12 | 958 students3400 Richmond Road
    (250) 370-6170
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