Boarding School Review - Established 2003
Sun Valley Community School
Riverstone International School

Idaho Boarding Schools

Located in Boise, Riverstone International School is a co-ed college-preparatory boarding school for grades 8-12 with 320 students. Tuition is $51,000 and 25% of students receive financial aid. Classes average 18 students.
Sun Valley Community School, a co-ed college-preparatory boarding school in Sun Valley, enrolls 405 students in grades 9-12. Tuition is $73,750 and 30% of students receive financial aid. Classes average 15 students.
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Quick Facts (26-27)

  • # Boarding Schools: 2
  • # Students Served: 725

Quick Facts (26-27)

  • # Boarding Schools: 2
  • # Students Served: 725

Top Idaho Boarding Schools (2026-27)

View top ranked boarding schools nationwide:

Riverstone International School Photo - Welcome to Riverstone International School! We look forward to welcoming you to our school in beautiful Boise, Idaho!
Riverstone International School
Gr: 8-12 | PK-12 (day) | 320 students
Student-teacher ratio: 7:1
Avg. class size: 18 students
Acceptance rate: 80%
Tuition listed
5521 East Warm Springs Avenue
Boise, ID 83716
(208) 424-5000
View Profile
Sun Valley Community School Photo - Students from around the nation and world come to Sun Valley Community School in Sun Valley, Idaho, to fulfill their potential and pursue their passions.
Sun Valley Community School
Gr: 9-12 | PK-12 (day) | 405 students
Student-teacher ratio: 6:1
Avg. class size: 15 students
Acceptance rate: 45%
Tuition listed
1 Community School Drive
Sun Valley, ID 83353
(208) 622-3960
View Profile
2
Boarding Schools
+100.0% (+1 school) 9-yr
765
Students
+96.2% (+375 students) 9-yr

Historical Statistics Overview

This State (ID)
US (avg. per state)
# Schools
2 Schools
6.4 Schools

Trends in Total Number of Boarding Schools

YearIdaho (ID) TotalUS Avg per State
202526.4
202426.2
202326.0
202225.9
202125.7
202025.4
201925.4
201825.2
201715.1
201614.9
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# Students
765 Students
2,517 Students

Trends in Total Number of Boarding School Students

YearIdaho (ID) TotalUS Avg per State
20257652,517
20248702,453
20238602,367
20228602,384
20218002,278
20208002,144
20197882,197
20187452,146
20173902,100
20163901,980
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Academics and Faculty

West Region*
US
* Fewer than 3 schools in Idaho report these figures, so the West regional average is shown.
Average Student-Teacher Ratio
8:1
8:1

Showing 2016–2025. Full 12-year historical data available below ↓

Regional Trends (West) in Average Student-Teacher Ratio

YearWest Region AvgNational Avg
20258:18:1
20248:17:1
20238:17:1
20227:17:1
20217:17:1
20207:17:1
20198:17:1
20187:17:1
20177:17:1
20167:17:1
20157:17:1
20147:17:1
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% Faculty with Advanced Degree
68%
69%

Showing 2016–2025. Full 12-year historical data available below ↓

Regional Trends (West) in Average % Faculty with Advanced Degrees

YearWest Region AvgNational Avg
202568%69%
202468%68%
202368%69%
202269%68%
202168%67%
202068%66%
201967%65%
201867%66%
201770%66%
201669%65%
201568%65%
201467%65%
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Academic Programs

West Region*
US
* Fewer than 3 schools in Idaho report these figures, so the West regional average is shown.
Avg. AP Courses
29
22

Showing 2016–2025. Full 12-year historical data available below ↓

Regional Trends (West) in Average Number of AP Courses Offered

YearWest Region AvgNational Avg
20252922
20242822
20232822
20222722
20212722
20202622
20192621
20182621
20172621
20162720
20152720
20141719
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Avg. IB Courses
—
28
Avg. Class Size
13
13

Showing 2016–2025. Full 12-year historical data available below ↓

Regional Trends (West) in Average Class Size

YearWest Region AvgNational Avg
20251313
20241313
20231313
20221313
20211313
20201212
20191213
20181213
20171213
20161213
20151313
20141313
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Academic Performance

West Region*
US
* Fewer than 3 schools in Idaho report these figures, so the West regional average is shown.
Avg. SAT Score
1289
1271

Regional Trends (West) in Average SAT Score

YearWest Region AvgNational Avg
202512891271
202412921274
202313161278
202213061276
202113031277
202013041273
201912991271
201813051273
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Avg. ACT Score
27
27

Showing 2016–2025. Full 12-year historical data available below ↓

Regional Trends (West) in Average ACT Score

YearWest Region AvgNational Avg
20252727
20242727
20232727
20222727
20212627
20202727
20192727
20182626
20172726
20162726
20152626
20142625
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Avg. Acceptance Rate
60%
59%

Showing 2016–2025. Full 12-year historical data available below ↓

Regional Trends (West) in Average Acceptance Rate

YearWest Region AvgNational Avg
202560%59%
202458%57%
202357%57%
202256%56%
202156%56%
202056%55%
201956%55%
201855%55%
201755%54%
201655%53%
201555%54%
201453%54%
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Tuition and Finances

West Region*
US
* Fewer than 3 schools in Idaho report these figures, so the West regional average is shown.
Avg. Tuition (Boarding)
$69,149
$64,455

Showing 2016–2025. Full 12-year historical data available below ↓

Regional Trends (West) in Average Tuition Cost

YearWest Region AvgNational Avg
2025$69,149$64,455
2024$66,291$62,584
2023$64,008$60,415
2022$60,119$58,343
2021$56,198$57,017
2020$54,564$55,760
2019$53,019$54,186
2018$51,282$52,108
2017$49,769$50,594
2016$48,480$49,180
2015$46,911$47,708
2014$45,143$48,599
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Avg. Tuition (Day)
$38,398
$38,004

Showing 2016–2025. Full 12-year historical data available below ↓

Regional Trends (West) in Average Day Student Tuition

YearWest Region AvgNational Avg
2025$38,398$38,004
2024$38,115$36,732
2023$35,092$35,848
2022$31,965$34,469
2021$33,651$34,614
2020$30,597$33,350
2019$30,003$31,555
2018$30,385$30,133
2017$29,041$29,344
2016$29,155$29,140
2015$27,256$28,042
2014$26,324$27,217
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Avg. Tuition (International)
$66,137
$62,450

Showing 2016–2025. Full 12-year historical data available below ↓

Regional Trends (West) in Average International Student Tuition

YearWest Region AvgNational Avg
2025$66,137$62,450
2024$67,249$59,956
2023$66,086$57,872
2022$61,462$56,738
2021$55,229$54,097
2020$54,387$52,930
2019$52,863$51,250
2018$50,581$47,647
2017$47,903$45,370
2016$46,541$45,211
2015$44,985$45,218
2014$48,151$45,073
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Avg. Financial Aid Rate
36%
42%

Showing 2016–2025. Full 12-year historical data available below ↓

Regional Trends (West) in Average Financial Aid Rate

YearWest Region AvgNational Avg
202536%42%
202437%41%
202339%41%
202238%40%
202138%40%
202037%39%
201936%38%
201837%38%
201737%37%
201637%36%
201537%36%
201435%35%
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Avg. Financial Aid Grant
$29,142
$27,075

Showing 2016–2025. Full 12-year historical data available below ↓

Regional Trends (West) in Average Financial Aid Grant

YearWest Region AvgNational Avg
2025$29,142$27,075
2024$28,299$26,722
2023$26,866$26,202
2022$27,871$26,183
2021$27,111$26,267
2020$27,643$26,166
2019$25,717$26,311
2018$24,249$25,365
2017$22,962$24,537
2016$21,830$23,339
2015$20,929$22,851
2014$21,214$22,694
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Avg. Endowment
$51 MM
$84 MM

Showing 2016–2025. Full 12-year historical data available below ↓

Regional Trends (West) in Average School Endowment

YearWest Region AvgNational Avg
2025$51 MM$84 MM
2024$49 MM$83 MM
2023$47 MM$77 MM
2022$46 MM$73 MM
2021$43 MM$73 MM
2020$41 MM$67 MM
2019$39 MM$67 MM
2018$36 MM$72 MM
2017$37 MM$71 MM
2016$29 MM$68 MM
2015$29 MM$67 MM
2014$28 MM$64 MM
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Student Diversity

West Region*
US
* Fewer than 3 schools in Idaho report these figures, so the West regional average is shown.
% Students of Color
34%
30%

Showing 2016–2025. Full 12-year historical data available below ↓

Regional Trends (West) in Average % Students of Color

YearWest Region AvgNational Avg
202534%30%
202434%29%
202332%29%
202232%27%
202130%27%
202030%26%
201930%24%
201830%24%
201729%22%
201628%22%
201528%21%
201427%21%
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% International Students
22%
27%

Showing 2016–2025. Full 12-year historical data available below ↓

Regional Trends (West) in Average % International Students

YearWest Region AvgNational Avg
202522%27%
202422%27%
202322%26%
202223%26%
202119%25%
202020%25%
201922%26%
201822%26%
201723%27%
201624%26%
201525%25%
201425%25%
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% Boarding Students
57%
59%

Showing 2016–2025. Full 12-year historical data available below ↓

Regional Trends (West) in Average % Boarding Students

YearWest Region AvgNational Avg
202557%59%
202458%60%
202359%61%
202260%61%
202158%61%
202059%62%
201961%62%
201859%62%
201762%63%
201664%63%
201568%64%
201468%63%
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Frequently Asked Questions

How many boarding schools are located in Idaho?
There are 2 college-preparatory boarding schools located in Idaho.
What is the oldest boarding school in Idaho?
Sun Valley Community School, founded in 1973, is the oldest boarding school in Idaho.

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