William Sidney Mount Elementary School
Stony Brook, NY · Three Village Central School District · Grades PK-6
882nd of 2,326 New York elementary schools statewide · better than 62%▼ Declining
William Sidney Mount Elementary School ranking
SchoolRow ranks William Sidney Mount Elementary School 882nd of 2,326 New York elementary schools for 2024–25, based on NYSED 3-8 assessments 2024–25; high schools: Regents 65+ rate English and Math results — better than 62% of elementary schools statewide. Its statewide percentile went from 87th in 2019 to 62th in 2025 — declining.
William Sidney Mount Elementary School test scores
Percent meeting or exceeding the state standard, NYSED 3-8 assessments 2024–25; high schools: Regents 65+ rate
William Sidney Mount Elementary School students
Racial and ethnic breakdown of 514 students (2023–24, NCES) — and how it has shifted since 2013
| Group | Trend | 2013 | 2023 | Change |
|---|---|---|---|---|
| White | 76.0% | 56.8% | ▼ 19.2 pts | |
| Asian | 14.2% | 23.7% | ▲ 9.5 pts | |
| Hispanic | 5.8% | 12.8% | ▲ 7.0 pts | |
| Two or more races | 1.5% | 5.1% | ▲ 3.6 pts | |
| Black | 2.1% | 1.6% | ▼ 0.5 pts |
Homes near William Sidney Mount Elementary School
Typical home value $778K in zip 11790 as of 2026-05 · trend since 2000
Data Provided by Zillow Group
Elementary schools near William Sidney Mount Elementary School
Closest same-level schools, with 2024–25 state rank
- 8Mills Pond Elementary SchoolSmithtown Central School District · 1.3 mi away482nd of 2,326
ELA 75% · Math 72% - 6Saint James Elementary SchoolSmithtown Central School District · 1.4 mi away1,115th of 2,326
ELA 58% · Math 57% - 10Nassakeag Elementary SchoolThree Village Central School District · 2 mi away230th of 2,326
ELA 82% · Math 82% - 1Eugene Auer Memorial SchoolMiddle Country Central School District · 2.3 mi away2,157th of 2,326
ELA 24% · Math 32% - 9Minnesauke Elementary SchoolThree Village Central School District · 2.6 mi away459th of 2,326
ELA 70% · Math 79% - 4Oxhead Road SchoolMiddle Country Central School District · 2.7 mi away1,526th of 2,326
ELA 46% · Math 48% - 8Wenonah SchoolSachem Central School District · 3.2 mi away611th of 2,326
ELA 69% · Math 71% - 8Dogwood Elementary SchoolSmithtown Central School District · 3.2 mi away642nd of 2,326
ELA 68% · Math 70%
Frequently asked questions
What school district is William Sidney Mount Elementary School in?
William Sidney Mount Elementary School is part of the Three Village Central School District district in Stony Brook, New York.
Is William Sidney Mount Elementary School a good school?
SchoolRow ranks William Sidney Mount Elementary School 882nd of 2,326 New York elementary schools (better than 62% statewide) based on 2024–25 test results (NYSED 3-8 assessments 2024–25; high schools: Regents 65+ rate).
What is the racial makeup of William Sidney Mount Elementary School?
White 57%, Asian 24%, Hispanic 13%, Two or more races 5% (514 students, 2023–24).
How much do homes near William Sidney Mount Elementary School cost?
The typical home value in zip code 11790 is $778K as of 2026-05 (Zillow ZHVI).
Sources: state education department data (NYSED 3-8 assessments 2024–25; high schools: Regents 65+ rate, low-income, chronic absenteeism), National Center for Education Statistics via the Urban Institute (enrollment, demographics, staffing), Zillow Group (home values). Rankings are computed by SchoolRow from state English and Math results within grade level; they measure test performance, not everything that makes a school good.