Serving 514 students in grades Prekindergarten-6, William Sidney Mount Elementary School ranks in the top 50% of all schools in New York for overall test scores (math proficiency is top 50%, and reading proficiency is top 50%).
The percentage of students achieving proficiency in math is 55-59% (which is higher than the New York state average of 46%). The percentage of students achieving proficiency in reading/language arts is 55-59% (which is higher than the New York state average of 49%).
The student:teacher ratio of 14:1 is higher than the New York state level of 11:1.
Minority enrollment is 43% of the student body (majority Asian), which is lower than the New York state average of 60% (majority Hispanic).
Quick Stats (2025)
- Grades: Prekindergarten-6
- Enrollment: 514 students
- Student:Teacher Ratio: 14:1
- Minority Enrollment: 43%
- Overall Testing Rank: Top 50% in NY
- Math Proficiency: 55-59% (Top 50%)
- Reading Proficiency: 55-59% (Top 50%)
- Science Proficiency: ≥90% (Top 30%)
- Source: National Center for Education Statistics (NCES), NY Dept. of Education
School Overview
William Sidney Mount Elementary School's student population of 514 students has stayed relatively flat over five school years.
The teacher population of 38 teachers has stayed relatively flat over five school years.
Grades Offered
Grades Prekindergarten-6
(Supplemental Virtual)
(Supplemental Virtual)
Total Students
514 students
Gender %
Total Classroom Teachers
38 teachers
School Rankings
William Sidney Mount Elementary School ranks within the top 50% of all 4,377 schools in New York (based off of combined math and reading proficiency testing data).
The diversity score of William Sidney Mount Elementary School is 0.60, which is less than the diversity score at state average of 0.72. The school's diversity has stayed relatively flat over five school years.
Overall Testing Rank
#1328 out of 4377 schools
(Top 50%)
(Top 50%)
Math Test Scores (% Proficient)
55-59%
46%
Reading/Language Arts Test Scores (% Proficient)
55-59%
49%
Science Test Scores (% Proficient)
≥90%
78%
Student : Teacher Ratio
14:1
11:1
American Indian
n/a
1%
Asian
24%
10%
Hispanic
13%
30%
Black
1%
16%
White
57%
40%
Hawaiian
n/a
n/a
Two or more races
5%
3%
All Ethnic Groups
Participates in the National School Lunch Program (NSLP)
Yes
Eligible for Free Lunch
19%
54%
Eligible for Reduced Lunch
1%
3%
School Statewide Testing
School District Name
Source: National Center for Education Statistics (NCES), NY Dept. of Education
Profile last updated: 02/09/2025
Frequently Asked Questions
What is William Sidney Mount Elementary School's ranking?
William Sidney Mount Elementary School is ranked #1328 out of 4,377 schools, which ranks it among the top 50% of public schools in New York.
What schools are William Sidney Mount Elementary School often compared to?
William Sidney Mount Elementary Schoolis often viewed alongside schools like Nassakeag Elementary School, Minnesauke Elementary School, Setauket Elementary School by visitors of our site.
What percent of students have achieved state testing proficiency in math and reading?
55-59% of students have achieved math proficiency (compared to the 46% NY state average), while 55-59% of students have achieved reading proficiency (compared to the 49% NY state average).
How many students attend William Sidney Mount Elementary School?
514 students attend William Sidney Mount Elementary School.
What is the racial composition of the student body?
57% of William Sidney Mount Elementary School students are White, 24% of students are Asian, 13% of students are Hispanic, 5% of students are Two or more races, and 1% of students are Black.
What is the student:teacher ratio of William Sidney Mount Elementary School?
William Sidney Mount Elementary School has a student ration of 14:1, which is higher than the New York state average of 11:1.
What grades does William Sidney Mount Elementary School offer ?
William Sidney Mount Elementary School offers enrollment in grades Prekindergarten-6 (Supplemental Virtual).
What school district is William Sidney Mount Elementary School part of?
William Sidney Mount Elementary School is part of Three Village Central School District.
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