Private School Review - Established 2003
Foothills School of Arts & Sciences Top 8 · Lowest Acceptance Rate (ID)
Bishop Kelly High School Top 3 · Most AP Courses (ID)
Cole Valley Christian High School Top 3 · Most AP Courses (ID)

Best Ada County Private High Schools (2026-27)

For the 2026-27 school year, there are 12 private high schools serving 4,572 students in Ada County, ID.
The average acceptance rate is 87%, which is higher than the Idaho private high school average acceptance rate of 85%.
50% of private high schools in Ada County, ID are religiously affiliated (most commonly Christian and Catholic).

Quick Facts (2026-27)

  • # Private Schools: 12
  • # Students Served: 4,572
  • Average Tuition: $13,001
  • % Students on Financial Aid: 17%
  • Acceptance Rate: 87%
  • Average Class Size: 19 students
  • % Students of Color: 11%
  • View Ada County, ID School Trends

Quick Facts (2026-27)

  • # Private Schools: 12
  • # Students Served: 4,572
  • Average Tuition: $13,001
  • % Students on Financial Aid: 17%
  • Acceptance Rate: 87%
  • Average Class Size: 19 students
  • % Students of Color: 11%
  • View Ada County, ID School Trends

Top Ranked Ada County Private High Schools (2026-27)

The Ambrose School Photo
The Ambrose School
Gr: PK-12 | 761 students
Avg. class size: 23 students
Sports: 7 | Extracurriculars: 8
Christian
6100 N. Locust Grove Rd.
Meridian, ID 83646
(208) 323-3888
(3)
View Profile
Bishop Kelly High School Photo
Bishop Kelly High School
Gr: 9-12 | 870 students
Avg. class size: 21 students
Sports: 19 | Extracurriculars: 32
Catholic
7009 Franklin Rd
Boise, ID 83709
(208) 375-6010
View Profile
Cole Valley Christian High School Photo
Cole Valley Christian High School
Gr: NS-12 | 1,517 students
Avg. class size: 24 students
Sports: 14 | Extracurriculars: 12
Christian
200 E Carlton Ave
Meridian, ID 83642
(208) 947-1212
(8)
View Profile
Map of Cole Valley Christian School
Cole Valley Christian School
Gr: 7-12 | 513 students
Avg. class size: 20 students
Christian
8775 W Ustick Rd
Boise, ID 83704
(208) 947-1212
View Profile
Riverstone International School Photo
Riverstone International School
Gr: PK-12 | 355 students
Avg. class size: 15 students
Sports: 11 | Extracurriculars: 21
5521 E Warm Springs Ave
Boise, ID 83716
(208) 424-5000
(11)
View Profile
Foothills School of Arts & Sciences Photo
Foothills School of Arts & Sciences
Gr: PK-9 | 158 students
Avg. class size: 13 students
Specialized Curriculum
601 South 9th Street
Boise, ID 83702
(208) 331-9260
View Profile
Map of Hall Institute For The Arts
Hall Institute For The Arts
Gr: 7-12 | 28 students
Specialized Curriculum
1167 E Iron Eagle Dr
Eagle, ID 83616
(208) 957-7024
View Profile
Map of Heroes Academy
Heroes Academy
Gr: PK-12 | 79 students
Montessori School
5771 N Discovery Way
Boise, ID 83713
(208) 991-4376
(3)
View Profile
Map of Intermountain School & Hosp
Intermountain School & Hosp
Gr: 7-12 | 20 students
Alternative School
303 N Allumbaugh St
Boise, ID 83704
(208) 350-2324
View Profile
Map of One Stone
One Stone
Gr: 9-12 | 126 students
Alternative School
1151 W Miller St
Boise, ID 83702
(208) 451-3825
View Profile
Map of Petra Christian Academy
Petra Christian Academy
Gr: 1-9 | 24 students
Christian
3080 Wildwood St
Boise, ID 83713
(208) 505-0066
View Profile
Map of Treasure Valley Baptist School
Treasure Valley Baptist School
Gr: PK-11 | 46 students
Baptist
1300 S Teare Ave
Meridian, ID 83642
(208) 898-9023
View Profile
[+] Show Closed Private Schools in Ada County, Idaho

Ada County Private High Schools (Closed)

Map of Five Mile Montessori
Five Mile Montessori
Gr: PK-K | 14 students
Montessori School
1439 S Weideman Ave
Boise, ID 83709
(208) 322-8981
View Profile
Map of Maranatha Christian School
Maranatha Christian School
Gr: K-6 | 66 students
Assembly of God
12000 W Fairview Ave
Boise, ID 83713
(208) 376-7272
View Profile
Map of Vineyard Christian Academy
Vineyard Christian Academy
Gr: PK-8 | 108 students
Specialized Curriculum (Christian)
4950 N Bradley St
Garden City, ID 83714
(208) 562-4551
View Profile

Overview

Category
This State (ID)
US
# Schools
12 Schools

Trends in Total Number of Private High Schools

YearAda County Total Schools
202512
202412
202311
20228
20217
20208
20198
201810
20179
201611
201511
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Note: Data may not be displayed on any public-facing website or service that replicates or resembles a school search or review portal without prior written permission. See our Terms of Service.

# Students
4,572 Students
12,167 Students

Trends in the Average Number of Students Per Private High School

YearAda County AverageIdaho (ID) AverageNational Average
2025381222253
2024371210245
2023349195247
2022444193257
2021489188249
2020343156235
2019336153242
2018263149238
2017288152246
2016269150241
2015262140220
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% Average Students of Color
11%
11%

Percentage of Students of Color Trends (2015-2025)

YearAda County AverageIdaho (ID) AverageNational Average
202511%12%32%
202412%12%31%
20239%11%31%
202211%12%30%
202111%12%30%
202012%12%29%
201910%11%29%
201810%12%28%
201713%13%30%
201612%13%30%
201512%13%30%
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Academics and Faculty:

# Teachers
429 Teachers
1,052 Teachers
Average Student-Teacher Ratio
11:1
12:1

Student-Teacher Ratio Trends (2015-2025)

YearAda County AverageIdaho (ID) AverageNational Average
202511:112:110:1
202410:112:110:1
202310:111:110:1
202212:112:110:1
202112:111:110:1
202012:111:110:1
201912:111:110:1
201811:111:110:1
201712:111:110:1
201612:112:110:1
201512:112:110:1
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% Average Faculty w/Advanced Degree
60%
52%

Percentage of Faculty With Advanced Degrees Trends (2015-2025)

YearAda County AverageIdaho (ID) AverageNational Average
202560%51%57%
202460%50%57%
202358%42%57%
202257%43%56%
202157%43%56%
202033%32%56%
201928%30%55%
201840%35%55%
201740%35%55%
201643%41%54%
201550%44%54%
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Average Class Size
19 students
16 students

Class Size Trends (2015-2025)

YearAda County AverageIdaho (ID) AverageNational Average
2025191514
2024191514
2023191414
2022191514
2021191514
2020181414
2019181414
2018171414
2017161314
2016161314
2015151314
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Average Number of AP Courses
18 courses
course
Average SAT score
1249
(Out of 1600)
Average ACT score
27
(Out of 36)

Tuition and Acceptance Rate:

Average Yearly Tuition Cost
$13,001
$11,401

Tuition Cost Trends (2015-2025)

YearAda County AverageIdaho (ID) AverageNational Average
2025$12,924$11,681$17,997
2024$10,441$9,064$17,011
2023$9,775$8,757$16,191
2022$9,375$7,728$15,821
2021$9,228$7,576$15,331
2020$8,728$7,339$15,046
2019$8,728$7,354$14,791
2018$7,220$6,938$14,527
2017$6,967$7,181$14,161
2016$6,098$6,636$13,713
2015$7,063$6,552$13,065
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Average % on Financial Aid
17%
21%

Percent on Financial Aid Trends (2015-2025)

YearAda County AverageIdaho (ID) AverageNational Average
202516%20%38%
202418%21%37%
202322%24%36%
202222%25%36%
202122%25%36%
202021%24%35%
201920%24%34%
201820%22%33%
201720%27%32%
201617%27%31%
201517%26%30%
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Average Financial Aid Grant
$5,171
$0
Average Acceptance Rate
87%
85%

Acceptance Rate Trends (2018-2025)

YearAda County AverageIdaho (ID) AverageNational Average
202587%85%79%
202485%84%81%
202384%85%81%
202282%88%81%
202182%88%81%
202084%87%81%
201983%87%81%
201885%87%80%
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Average Endowment Size
$7 million
$ million

Students by Ethnicity:

0.50
0.49

Diversity Score Trends

YearAda County AverageIdaho (ID) AverageNational Average
20250.500.500.61
20240.490.500.60
20230.510.510.60
20220.550.530.58
20210.540.530.57
20200.420.450.57
20190.420.440.56
20180.390.440.55
20170.500.480.54
20160.470.470.54
20150.450.460.53
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# American Indian Students
11 Students
58 Students
% American Indian Students
n/a
1%

Percentage of Private High School Students of American Indian Trends

YearAda County AverageIdaho (ID) AverageNational Average
20161%1%1%
20151%1%1%
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# Asian Students
107 Students
267 Students
% Asian Students
2%
2%

Asian Student Percentage Trends

YearAda County AverageIdaho (ID) AverageNational Average
20252%3%5%
20243%3%6%
20234%3%6%
20224%3%5%
20214%3%5%
20205%3%5%
20194%3%5%
20184%3%5%
20173%2%4%
20163%2%4%
20153%2%4%
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# Hispanic Students
165 Students
502 Students
% Hispanic Students
4%
4%

Hispanic Student Percentage Trends

YearAda County AverageIdaho (ID) AverageNational Average
20254%4%9%
20244%4%9%
20231%4%8%
20223%3%8%
20212%4%8%
20203%4%8%
20193%4%8%
20183%4%8%
20173%4%7%
20163%4%8%
20153%4%8%
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# Black Students
59 Students
160 Students
% Black Students
1%
1%

Black Student Percentage Trends

YearAda County AverageIdaho (ID) AverageNational Average
20251%1%8%
20241%1%8%
20232%1%8%
20221%1%8%
20211%1%8%
20202%2%8%
20192%2%8%
20182%2%8%
20172%1%8%
20162%1%8%
20152%1%9%
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# White Students
2,958 Students
8,115 Students
% White Students
66%
67%

White Student Percentage Trends

YearAda County AverageIdaho (ID) AverageNational Average
202566%66%59%
202467%67%60%
202364%64%60%
202258%62%62%
202159%62%63%
202074%72%64%
201974%73%64%
201877%73%65%
201766%68%66%
201669%70%66%
201571%70%66%
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# Hawaiian Students
10 Students
27 Students
% Hawaiian Students
n/a
n/a
# Two or more races Students
n/a
n/a
% of Two or more races Students
n/a
n/a
# Others Students
1,198 Students
3,002 Students
% of Others Students
27%
25%

Other Races Student Percentage Trends

YearAda County AverageIdaho (ID) AverageNational Average
202527%26%17%
202425%25%15%
202329%28%16%
202234%31%16%
202134%30%15%
202016%18%14%
201917%17%14%
201814%17%13%
201726%24%14%
201622%22%13%
201520%22%12%
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All Ethnic Groups

Extracurriculars and Sports:

Average Number of Extracurriculars
18 extracurriculars
9 extracurriculars
Average Number of Sports
13 sports
8 sports

Frequently Asked Questions

What are the top ranked private high schools in Ada County, ID?
The top ranked private high schools in Ada County, ID include The Ambrose School, Cole Valley Christian High School, and Riverstone International School.
How many private high schools are located in Ada County?
12 private high schools are located in Ada County.
How diverse are private high schools in Ada County?
Ada County private high schools are approximately 11% minority students, which is same as the Idaho private school average of 11%.
What percentage of private high schools are religiously affiliated in Ada County?
50% of private high schools in Ada County are religiously affiliated (most commonly Christian and Catholic).
Which private high schools in Ada County are often viewed compared to one another?

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