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Boulder Sudbury School

Private, Other Grades

Students ?

10.5

Student/teacher ratio ?

3800 Plateau Rd
Longmont, CO 80503

(720) 943-0918

Racial breakdown:

White:

51.4%

Two or more races:

32.4%

African American:

10.8%

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Schools Near Boulder Sudbury School

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Ranking:

E Elementary M Middle H High A Alternative P Private

Choose columns to see: Summary School Students/Teachers Finance All

School								Students/Teachers											Per Pupil Expenditures (2025)
Name	Type	Grades	Address	City	Zip	County	Phone	Enrollment	Full-time Teachers	Student/ Teacher Ratio	Free/Discounted Lunch Recipients	White	Black	Hispanic	Asian	American Indian	Pacific Islander	Two or More Races	Total
Boulder Sudbury School	Private, Other		3800 Plateau Rd	Longmont	80503	Boulder County	(720) 943-0918	37	4	10.5		19 (51.4%)	4 (10.8%)	0 (0.0%)	2 (5.4%)	0 (0.0%)	0 (0.0%)	12 (32.4%)
Watershed School	Private, Nonsectarian	6-12	5405 Spine Rd	Boulder	80301	Boulder County	(303) 440-7520	114	17	6.7		0 (0.0%)	0 (0.0%)	0 (0.0%)	0 (0.0%)	0 (0.0%)	0 (0.0%)	0 (0.0%)
Boulder Valley Waldorf School	Private, Nonsectarian	PK, KG-8	6500 Dry Creek Pkwy	Niwot	80503	Boulder County	(303) 652-0130	134	22	5.0		0 (0.0%)	0 (0.0%)	0 (0.0%)	0 (0.0%)	0 (0.0%)	0 (0.0%)	0 (0.0%)
Shining Mountain Waldorf School	Private, Nonsectarian	PK, KG-12	999 Violet Ave	Boulder	80304	Boulder County	(303) 951-8573	183	17	9.9		145 (79.2%)	0 (0.0%)	4 (2.2%)	3 (1.6%)	0 (0.0%)	1 (0.5%)	17 (9.3%)
Tara Performing Arts High School	Private, Nonsectarian	9-12	4180 19th St	Boulder	80304	Boulder County	(303) 410-4510	39	10	3.7		0 (0.0%)	0 (0.0%)	0 (0.0%)	0 (0.0%)	0 (0.0%)	0 (0.0%)	0 (0.0%)
Joshua School-Boulder	Private, Nonsectarian	4-12	7077 Harvest Rd	Boulder	80301	Boulder County	(303) 974-7732	18	5	3.9		10 (55.6%)	1 (5.6%)	4 (22.2%)	2 (11.1%)	0 (0.0%)	0 (0.0%)	1 (5.6%)
Boulder Country Day School	Private, Nonsectarian	PK, KG-8	4820 Nautilus Ct N	Boulder	80301	Boulder County	(303) 516-4148	361	49	5.7		239 (66.2%)	3 (0.8%)	29 (8.0%)	4 (1.1%)	0 (0.0%)	0 (0.0%)	6 (1.7%)
Hillside School	Private, Nonsectarian	1-9	7415 Lookout Rd	Longmont	80503	Boulder County	(303) 494-1468	75	12	6.0		65 (86.7%)	2 (2.7%)	4 (5.3%)	1 (1.3%)	0 (0.0%)	0 (0.0%)	3 (4.0%)
Jarrow Montessori School	Private, Nonsectarian	PK, KG-6	3900 Orange Ct	Boulder	80304	Boulder County	(303) 443-0511	171	9	7.5		67 (39.2%)	0 (0.0%)	2 (1.2%)	1 (0.6%)	0 (0.0%)	0 (0.0%)	0 (0.0%)
Ziji Early Elementary	Private, Nonsectarian	K-2	6390 Jay Rd	Boulder	80301	Boulder County	(303) 530-0844	16	2	7.6		13 (81.3%)	1 (6.3%)	1 (6.3%)	1 (6.3%)	0 (0.0%)	0 (0.0%)	0 (0.0%)

Frequently Asked Questions about Boulder Sudbury School

What is the racial makeup of Boulder Sudbury School?

Students at Boulder Sudbury School are 51% White, 32% Two or more races, 11% African American, 5% Asian.

How many students attend Boulder Sudbury School?

In the 2023-24 school year, 37 students attended Boulder Sudbury School.

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Latest Colorado data All new data »

2025–26 CMAS, PSAT10, PSAT9 & SAT test scoresAug 19, 2026

2024–25 school spending dataJun 13, 2026

2024–25 dropout rates & graduation ratesJan 13, 2026

2024–25 attendance dataAug 27, 2025

SchoolDigger data sources: National Center for Education Statistics, U.S. Department of Education, the U.S. Census Bureau and the Colorado Department of Education.

IMPORTANT DISCLAIMERS: Not all boundaries are included. We make every effort to ensure that boundaries are up-to-date. But it's important to note that these are approximations and are for general informational purposes only. To verify legal descriptions of boundaries or school locations, contact your local tax assessor's office and/or school district.

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