A+
Excellent
96/100

William Sidney Mount Elementary School

📚 Pre-K – 06 🏫 School
📍 50 DEAN LN, Stony Brook, NY 11790
96
Repit Score
out of 100
514
Students
enrolled
13.6:1
Student:Teacher
ratio
$38K
Per Student
spending

What We Evaluated

👨‍🏫 Class Size 13.6:1 student-teacher ratio
💰 Funding $37,856 per student
🏫 School Type Regular

School Information

Address 50 DEAN LN
City Stony Brook
ZIP Code 11790
District 3628200
NCES School ID 362820003810
Data Year 2024-25

Community Context for 11790

Understanding the community around William Sidney Mount Elementary School helps evaluate the school environment and neighborhood.

💰 Income & Economy

Median Household Income $145,545
Per Capita Income $48,293
Poverty Rate 0.7%
Households Earning $100K+ 71.1%

🎓 Education Level

Bachelor's Degree or Higher 67.3%
High School or Higher 98.8%

🏠 Housing

Median Home Value $579,700
Median Rent $2,836
Owner-Occupied 89.2%
Renter-Occupied 10.8%
View full data for ZIP 11790 →

Thinking about moving into this school’s area? See what homes and rents actually cost in ZIP 11790 — values, rent, and how it compares to nearby ZIPs. Free, no signup. See 11790 housing costs →

Student Demographics

Enrollment and demographic breakdown for William Sidney Mount Elementary School.

👫 Gender Distribution

Male 50.8%
Female 49.2%

🌎 Race & Ethnicity

White 56.8%
Asian 23.7%
Hispanic/Latino 12.8%
Two or More Races 5.1%
Black 1.6%

📋 Enrollment Summary

Total Enrollment 514
Teachers (FTE) 37.8
Student:Teacher Ratio 13.6:1

Frequently Asked Questions

What is the Repit School Score for William Sidney Mount Elementary School?
William Sidney Mount Elementary School has a Repit School Score of 96 out of 100, earning a grade of A+. This score evaluates class size (student-teacher ratio), funding levels, and resources rather than just test scores.
How many students attend William Sidney Mount Elementary School?
William Sidney Mount Elementary School has 514 students enrolled for the 2024-25 school year. The student-to-teacher ratio is 13.6:1.
What grades does William Sidney Mount Elementary School serve?
William Sidney Mount Elementary School serves grades Pre-K – 06 and is classified as a School. This is a public school.
How much funding does William Sidney Mount Elementary School receive per student?
William Sidney Mount Elementary School receives $37,856 in per-pupil spending from its district. This is above the national average.
🏠 Rental Market Around William Sidney Mount Elementary School in 11790 ▼
Avg Home Value
$797,463
Avg Monthly Rent
$4,621
1-Year Change
+9.1%
% Renters
10.8%

Other Schools in 11790

A+

ROBERT CUSHMAN MURPHY JUNIOR HIGH SCHOOL

07 – 09 • High School
Repit Score 100/100
View all schools and real estate data for 11790 →

About Repit School Scores

Traditional school ratings rely heavily on standardized test scores, which often reflect family income more than actual school quality. Repit takes a different approach.

We evaluate schools based on factors that research shows actually impact educational outcomes:

  • Class Size — Smaller classes mean more individual attention and better student outcomes.
  • School Funding — Resources available for programs, teachers, and facilities directly affect education quality.
  • School Environment — School size and structure affect available programs and student experience.

Data source: NCES CCD 2024-25 | Last updated: September 2026