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Directory Information (2024-2025 school year)
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School Name: William Sidney Mount Elementary School
NCES School ID: 362820003810
State School ID: NY-580201060000-580201060006
District Name: Three Village Central School District
NCES District ID: 3628200
State District ID: NY-580201060000
Mailing Address:PO BOX 9050EAST SETAUKET NY, 11733 –9050
Physical Address:50 DEAN LN
STONY BROOK NY, 11790 –2799
Phone: (631)730-4300
Type: Regular school
Status: Open
Charter: No
Supervisory Union #: N/A
Grade Span: PK - 6
PKKG123456            
Website:http://www.threevillagecsd.org
School Details (2024-2025 school year)
County: Suffolk County
Locale: Suburban, Large (21)
Total Students: 525
Classroom Teachers (FTE): 40.23
Student/Teacher Ratio: 13.05
Note: Starting SY 2022-23, Magnet and Title I status data are no longer included in the CCD release. For Magnet status, refer to the Civil Rights Data Collection; for ESSA Title I status, refer to ED Data Express.
Enrollment Characteristics (2024-2025 school year)
Enrollment by Grade:
  PK KG 1 2 3 4 5 6
 Students  39 61 61 61 74 81 75 73
Enrollment by Gender:
  Male Female
 Students  268 257
Enrollment by Race/Ethnicity:
  American Indian/
Alaska Native		 Asian Black Hispanic White Native Hawaiian/
Pacific Islander		 Two or More Races
 Students  0 128 6 74 289 0 28
Free lunch eligible1: 102 Reduced-price lunch eligible1: 5
Free and reduced-price lunch eligible total1: 107 Free lunch eligible by Direct Certification2: –
Note: Details may not add to totals.
Note: The inclusion or exclusion of a school in this locator does NOT constitute an endorsement of the school and should NOT be used in any way to infer the accreditation status of the school.
Source: CCD Public school data 2024-2025 school year
Notes:
  • The unduplicated number of students who are eligible to participate in the Free Lunch and Reduced-Price Lunch Programs under the National School Lunch Act of 1946.
  • The unduplicated number of students who are eligible for the National School Lunch Program (NSLP) through direct certification (e.g., children that are in households that receive Supplemental Nutrition Assistance (SNAP) or other assistance). Please see this blog post for more information regarding free or reduced-price lunch and direct certification eligibility counts in CCD.
  • [ † ] indicates that the data are not applicable.
  • [ – ] indicates that the data are missing.
  • [ ‡ ] indicates that the data do not meet NCES data quality standards.