publicmiddlePK-6

William Sidney Mount Elementary School

50 Dean Ln, Stony Brook, NY 11790, United States

+1 (631) 730-4300

http://www.threevillagecsd.org

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Overall Rating

Location

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William Sidney Mount Elementary School Overview

About This School

William Sidney Mount Elementary School is a public middle in Stony Brook, New York, serving 525 students in grades PK-6. Academic results show that students demonstrate strong performance with 88% proficiency in ELA, 82% in math, and 85% in science. The school maintains a 13:1 student-teacher ratio with 40 teachers on staff, while the average teacher salary is $150,536. Students at the school are 51% male and 49% female. The demographic makeup includes 55% White, 24% Asian, 14% Hispanic, 5% Two or More Races, and 1% Black students.

525

Total Students

PK-6

13:1

Student-Teacher Ratio

40 full-time teachers

Academic Performance

Percentage of students who met or exceeded state standards

English Language Arts0%

Mathematics0%

Science0%

School Information

School Type

public

Grade Levels

PK-6

County

Suffolk County

Students per Counselor

N/A:1

William Sidney Mount Elementary School Academics & Test Scores

Test Scores

State assessment results showing percentage of students proficient or above

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English Language Arts

N/A

Mathematics

N/A

Science

Class Information

13:1

Student-Teacher Ratio

City Avg: 11.5:1

State Avg: 11.2:1

Students per Counselor

William Sidney Mount Elementary School Teachers & Staff

Teaching Staff

Total Full-Time Teachers

Average Teacher Salary

$150,536

City Avg: $150,536

State Avg: $91,676

Based on state average salaries for full-time teachers

Support Staff

Student-Teacher Ratio13:1

Students per Counselor:1

William Sidney Mount Elementary School Student Demographics

Student Body

51.05%

Male

48.95%

Female

Total Enrollment: 525 students

Racial & Ethnic Diversity

White55.05%

Hispanic14.1%

Asian24.38%

Black1.14%

Two or More Races5.33%

Native American0%

William Sidney Mount Elementary School Reviews

Frequently Asked Questions About William Sidney Mount Elementary School

Q: What is William Sidney Mount Elementary School?

A: William Sidney Mount Elementary School is a middle public located in Stony Brook.

Q: How many students attend William Sidney Mount Elementary School?

A: William Sidney Mount Elementary School has approximately 525 students enrolled.

Q: What is the student-teacher ratio at William Sidney Mount Elementary School?

A: The student-teacher ratio at William Sidney Mount Elementary School is 13:1.

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Detailed Information about William Sidney Mount Elementary School

Data sourced from NCES, CCD, and state education agencies. Last verified: May 2026. See methodology →

Schoolary Research Team

Verified with NCES & state education agency data

About William Sidney Mount Elementary School - Stony Brook, NY

Quick Facts about William Sidney Mount Elementary School
School Name	William Sidney Mount Elementary School
School Type	public
Grade Levels	PK-6
Location	50 Dean Ln, Stony Brook, NY 11790, Stony Brook, NY
County	Suffolk County
Phone	+1 (631) 730-4300
Total Students	525
Student-Teacher Ratio	13:1
Full-Time Teachers	40
Rating	/10
ELA Proficiency	%
Math Proficiency	%
Science Proficiency	%

Frequently Asked Questions about William Sidney Mount Elementary School

What is William Sidney Mount Elementary School?

William Sidney Mount Elementary School is a middle public located in Stony Brook.

How many students attend William Sidney Mount Elementary School?

William Sidney Mount Elementary School has approximately 525 students enrolled.

What is the student-teacher ratio at William Sidney Mount Elementary School?

The student-teacher ratio at William Sidney Mount Elementary School is 13:1.

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