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NY Regular School Elementary School

WILLIAM SIDNEY MOUNT ELEMENTARY SCHOOL

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50 DEAN LN, STONY BROOK, NY 11790 • Suffolk County
(631) 730-4300
Website

Student Enrollment & Staffing Overview

NCES 2024-2025
Total Students
525
Teachers (FTE)
40.2
Student-Teacher Ratio
13.1:1
FRPL Eligible
107
(20.4%)
National School Lunch Program (FRPL) Eligibility Total Eligible: 107 of 525 (20.4%)
Free Lunch: 102 (19.4%)
Reduced-Price: 5 (1%)
Paid / Not Eligible: 418 (79.6%)

Multi-Year Enrollment Trends & Growth (2020-2021 – 2024-2025)

0 350 700 2020-2021: 455 students 455 2020-2021 2021-2022: 470 students 470 +3.3% 2021-2022 2022-2023: 511 students 511 +8.7% 2022-2023 2023-2024: 514 students 514 +0.6% 2023-2024 2024-2025: 525 students 525 +2.1% 2024-2025

Student Diversity Distribution

Demographic composition of enrolled students across racial & ethnic backgrounds.

NCES 2024-2025
White: 289 (55%) Asian: 128 (24.4%) Hispanic / Latino: 74 (14.1%) Two or More Races (Multiracial): 28 (5.3%) Black or African American: 6 (1.1%)
525 Students
White 289 55%
Asian 128 24.4%
Hispanic / Latino 74 14.1%
Two or More Races (Multiracial) 28 5.3%
Black or African American 6 1.1%

Grade-Level Enrollment Distribution

Distribution of student body across reported grade cohorts.

Total: 525 Students
Grade 1: 61 (11.6%) Grade 2: 61 (11.6%) Grade 3: 74 (14.1%) Grade 4: 81 (15.4%) Grade 5: 75 (14.3%) Grade 6: 73 (13.9%) Kindergarten: 61 (11.6%) Pre-Kindergarten: 39 (7.4%)
525 Students
Grade 1 61 11.6%
Grade 2 61 11.6%
Grade 3 74 14.1%
Grade 4 81 15.4%
Grade 5 75 14.3%
Grade 6 73 13.9%
Kindergarten 61 11.6%
Pre-Kindergarten 39 7.4%

Student Gender Distribution

Reported enrollment counts by gender cohort.

NCES 2024-2025
M
Male Students
268
51%
F
Female Students
257
49%