Delphian School Photo - All students are involved in relevant, hands-on, learning experiences that allow students to relate their studies to real life.

Best Oregon Boarding Schools

For the 2026-27 school year, there are 4 college-prep and junior boarding schools serving 1,667 students located throughout Oregon.

Top Oregon Boarding Schools (2026-27)

School
Location
Quick Facts
Delphian School
Delphian School Photo - Delphian is located just one hour from Portland, OR. on a large 720 acre wooded campus. The residential community is in constant motion, alive with students from all around the world.
(28)
20950 SW Rock Creek Road
Sheridan, OR 97378
(503) 843-3521
Gr: 5-12 | PK-12 (day) | 220 students Student-teacher ratio: 10:1 Avg. class size: 13 students Acceptance rate: 53% Tuition listed
Oregon Episcopal School
Oregon Episcopal School Photo - Since 1869, our mission has been to inspire intellectual, physical, social, emotional, artistic, and spiritual growth so that students realize their power for good as citizens of local and world communities.
(Episcopal)
6300 SW Nicol Road
Portland, OR 97223
(503) 768-3115
Gr: 9-12, PG | PK-12, PG (day) | 875 students Student-teacher ratio: 7:1 Avg. class size: 16 students Tuition listed
St. Mary's School
St. Mary's School Photo
(Catholic)
816 Black Oak Drive
Medford, OR 97504
(541) 773-7877
Gr: 6-12 | 5-12 (day) | 504 students Student-teacher ratio: 10:1 Avg. class size: 15 students Tuition listed
Wy'East Mountain Academy
Wy'East Mountain Academy Photo
(5)
59550 East Highway 26
Sandy, OR 97055
(503) 622-8931
Gr: 7-12, PG | 68 students Student-teacher ratio: 15:1 Avg. class size: 15 students Acceptance rate: 100% Tuition listed

Historical Statistics Overview

This State (OR)
US (avg. per state)
# Schools
4 Schools
6.4 Schools
# Students
1,667 Students
2,517 Students

Academics and Faculty

This State (OR)
US
Average Student-Teacher Ratio
11:1
8:1
% Faculty with Advanced Degree
64%
69%

Academic Programs

This State (OR)
US
Avg. AP Courses
14
22
Avg. IB Courses
None reported
28
Avg. Class Size
14
13

Academic Performance

West Region*
US
* Fewer than 3 schools in Oregon report these figures, so the West regional average is shown.
Avg. SAT Score
1289
1271
Avg. ACT Score
27
27
Avg. Acceptance Rate
60%
59%

Tuition and Finances

This State (OR)*
US
* Fewer than 3 schools in Oregon report Avg. Tuition (International), Avg. Financial Aid Grant and Avg. Endowment, so the West regional average is shown for those rows.
Avg. Tuition (Boarding)
$66,488
$64,455
Avg. Tuition (Day)
$30,448
$38,004
Avg. Tuition (International)
$66,137
$62,450
Avg. Financial Aid Rate
36%
42%
Avg. Financial Aid Grant
$29,142
$27,075
Avg. Endowment
$51 MM
$84 MM

Student Diversity

This State (OR)
US
% Students of Color
28%
30%
% International Students
17%
27%
% Boarding Students
51%
59%

Frequently Asked Questions

How many boarding schools are located in Oregon?
There are 4 college-preparatory boarding schools located in Oregon.
What is the average tuition cost of boarding school in Oregon?
The average Oregon boarding school tuition cost is $67,863 per year.
What is the oldest boarding school in Oregon?
St. Mary's School, founded in 1865, is the oldest boarding school in Oregon.
What boarding school in Oregon has the lowest acceptance rates?
Delphian School has the lowest boarding school acceptance rate (53%) in Oregon.
What boarding school in Oregon has the highest average SAT scores?
St. Mary's School has the highest average SAT scores (1320) in Oregon.
Which boarding schools in Oregon are often viewed compared to one another?
Popular comparisons of boarding schools in Oregon include: Wy'East Mountain Academy vs. Delphian School

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