42 Private Schools in Ada County, ID

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School	City	Grades	Students	Per teacher	Affiliation
Bishop Kelly High School	Boise	9-12	967	16	Roman Catholic
Boise State University Trio Upward Bound	Boise	9-11	80	6.2	Nonsectarian
Boise Valley Adventist School	Boise	PreK-8	75	12.9	Seventh-Day Adventist
Calvary Christian School	Boise	PreK-8	223	13.2	Christian (nondenominational)
Challenger School	Boise	PreK-1	not reported	not reported	not reported
City Hope School	Boise	PreK-6	not reported	not reported	not reported
Cloverdale Montessori	Boise	PreK-K	5	not reported	Nonsectarian
Foothills School of Arts and Sciences	Boise	K-9	not reported	not reported	not reported
Hillside Academy	Boise	PreK-K	3	not reported	Nonsectarian
Kidz Connection Montessori	Boise	PreK-5	30	2.3	Nonsectarian
Lakewood Montessori	Boise	PreK-3	not reported	not reported	not reported
Learning Tree	Boise	PreK-K	9	2	Nonsectarian
Logan Christian Academy	Boise	K-7	not reported	not reported	not reported
Montessori Academy on Parkcenter	Boise	PreK-K	14	2	Nonsectarian
Montessori School of Boise, Casa Dei Bambini	Boise	PreK-K	4	4	Nonsectarian
Northview Montessori Preschool and Kindergarten	Boise	PreK-K	14	5.8	Nonsectarian
One Stone	Boise	9-12	87	36.2	Nonsectarian
Overland Montessori	Boise	PreK-K	8	3.2	Nonsectarian
Petra Christian Academy	Boise	K-8	not reported	not reported	not reported
Riverstone International School	Boise	PreK-12	349	5	Nonsectarian
Rose Hill Montessori School	Boise	PreK-6	22	8.5	Nonsectarian
Sacred Heart Catholic School	Boise	PreK-8	195	15	Roman Catholic
St. Joseph's Catholic School	Boise	K-8	367	15.3	Roman Catholic
St. Marks Elementary School	Boise	PreK-8	323	13.7	Roman Catholic
St. Marys School	Boise	PreK-8	109	6	Roman Catholic
The Children's School of Boise	Boise	PreK-K	3	not reported	Nonsectarian
Wesleyan Preschool & Kindergarten	Boise	PreK-Transitional K	14	10.8	Methodist
Eagle Adventist Christian School & Preschool	Eagle	PreK-8	23	4.6	Seventh-Day Adventist
Freedom Academy	Eagle	K-11	not reported	not reported	not reported
Innovate Academy and Preparatory School	Eagle	PreK-8	not reported	not reported	not reported
Montessori Academy	Eagle	PreK-6	62	10.3	Nonsectarian
Smarty Pants Preschool & Kindergarten	Kuna	PreK-K	1	not reported	Nonsectarian
A Child's Choice Montessori School	Meridian	PreK-6	52	6.2	Nonsectarian
Calvary Meridian Prep Academy	Meridian	K-10	185	15	Christian (nondenominational)
Challenger School	Meridian	PreK-8	not reported	not reported	not reported
Cole Valley Christian Schools-Secondary	Meridian	PreK-12	1,263	15.8	Christian (nondenominational)
Joshua Institute Academy	Meridian	3-12	56	8	Christian (nondenominational)
St. Ignatius Catholic School	Meridian	PreK-8	428	17.8	Roman Catholic
The Ambrose School	Meridian	K-12	not reported	not reported	not reported
The Preschool & Kindergarten @ten Mile Christian	Meridian	PreK-K	20	12.5	Christian (nondenominational)
Treasure Valley Baptist School	Meridian	K-12	not reported	not reported	not reported
Little Miracles	Star	PreK-K	10	10	Friends

Ada County private schools at a glance

Towns: 5; the most in Boise (27), Meridian (9) and Eagle (4)
Among Idaho counties: 1st most private schools of 24; 29% of the state’s 144
Typical school: 109 students (19 reporting)
Smallest and largest: Rose Hill Montessori School, 22 students; Cole Valley Christian Schools-Secondary, 1,263 students
Students per teacher: 10 typical, 2 to 36.2 across 27 schools
Programs: 9 Montessori, 1 special education
Association members: 14, most often the National Catholic Educational Association
To a 4-year college: 78% of graduates at the typical high school (5 reporting)
State program: Refundable tax credit, up to $5,000 per student
How PCTC works
Public charter schools: 27 in the county, tuition-free and not counted here
Charter schools in Idaho

Affiliation, 42 schools

Catholic6
Christian, not Catholic9
Nonsectarian16
Not in federal survey11

Grade levels (overlapping), 42 schools

Pre-K (and up)29
Elementary (K to 5)39
Middle (6 to 8)24
High school (9 to 12)11
K to 12, one school4

School size, 19 reporting

Under 503
50 to 1497
150 to 2993
300 to 5994
600 or more2

Lowest published tuition, 7 schools

Lowest$7,930Middle$9,100Highest$19,400

Where these facts come from

Grades, size, affiliation, co-ed, membership, college-going: NCES Private School Universe Survey 2023-24, downloaded September 20, 2026.
Award and rules: Idaho Parental Choice Tax Credit, official page, read October 2, 2026.
Tuition for 7 schools: each school’s own website, last read October 14, 2026.
Public charter schools: NCES Common Core of Data, public school directory 2025-26 (preliminary), loaded October 8, 2026.

Cities in and around Ada County

Neighboring counties

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January 15, 2027 to March 15, 2027 Idaho PCTC: Application window for 2026 expenses.

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