Seaford Senior High School, Seaford NY

Original Research by School Decision on Seaford Senior High School

Seaford Senior High School is a four-year public high school in a mature suburban residential hamlet on Long Island's South Shore, about an hour by rail from Manhattan. The school enrolls a student body that is predominantly white, with smaller shares of Hispanic, Asian, and multiracial students, and a modest share of students eligible for free or reduced-price lunch. The enrollment is balanced across the four grades, creating a school of mid-sized scale typical of a suburban district high school.

The hamlet itself is canal-lined and family-oriented, anchored by retail and dining along Merrick Road and bisected by Sunrise Highway. Transit consists mainly of the Babylon Branch rail line, which provides a connection to the city, supplemented by bus service; the area is suburban in character and car-dependent. Housing in the immediate area is substantial and appreciating, with homes selling in a tight market and rents rising. The broader Nassau County context shows a housing market with elevated property values and low supply of listings relative to demand, pricing homes well above the national median.

The Seaford Union Free School District, which operates this high school, has made deliberate curriculum moves in recent years. The district launched a free, lottery-based universal pre-K program after initially declining to offer one, and has expanded college-credit pathways at the high school through a partnership with Long Island University, bringing forensics and virtual enterprises courses into the offering. Coding instruction and technology infrastructure have also been upgraded. On the revenue side, the district has consistently held spending and tax levy increases at or below the state cap, providing relative predictability for property owners, and recent budgets have included the tax levy well under the county average.

State testing results and a four-year graduation rate were not available for this school; the payload did not include those metrics, which may reflect reporting lags or data suppression practices at the school or state level. Without those benchmarks, a parent or resident cannot directly assess proficiency trends or graduation outcomes. A parent may want to reach out to the school or district directly to discuss recent performance data and ask about specific academic programs, dual-credit options, and college placement outcomes. The school's size, location on a suburban campus in a residential hamlet, and access to rail transit are concrete features that define the student and family environment here, regardless of performance data availability.

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Academic performance

How students graduate and prepare for what comes next.

Graduation rate (ACGR)

>=95%Cohort of 190 students · Class of 2021

The federal source publishes a banded range instead of an exact rate when the graduating cohort is small enough that an exact number could risk identifying individual students.

How this school compares to all schools in this state

Each dot is one school’s SY 2020-21 graduation rate, binned by integer rate. Taller columns mean more schools at that rate. This school is highlighted.

1,253 schools plotted. 14 additional schools' rates are federally suppressed and not shown. Data: EDFacts SY 2020-21.

Advanced Placement & IB

22 subjects offered · 2023-24

Each card is one AP or IB subject. The headline number is the share of students scoring 3 or higher on the exam — the threshold for college credit at most universities. The bar below each rate shows the underlying distribution across performance levels.

Score:12· no credit345· extremely well qualified

Math and Computer Science

Calculus AB

8 tested

25.0%

scored 3 or higher

Calculus BC

12 tested

75.0%

scored 3 or higher

Computer Science Principles

3 tested · Grade 10

0.0%

scored 3 or higher

Statistics

38 tested · Grade 10

52.6%

scored 3 or higher

Sciences

Biology

50 tested

70.0%

scored 3 or higher

Chemistry

6 tested

0.0%

scored 3 or higher

Environmental Science

25 tested · Grade 9

48.0%

scored 3 or higher

Physics 1

7 tested

0.0%

scored 3 or higher

English

Research

25 tested

100.0%

scored 3 or higher

Seminar

68 tested · Grade 10

95.6%

scored 3 or higher

History and Social Sciences

Macroeconomics

13 tested

61.5%

scored 3 or higher

Psychology

68 tested

55.9%

scored 3 or higher

U.S. History

70 tested

74.3%

scored 3 or higher

World Languages and Cultures

French Language and Culture

1 tested

0.0%

scored 3 or higher

Spanish Language and Culture

27 tested

48.1%

scored 3 or higher

Arts

Music Theory

8 tested · Grade 10

62.5%

scored 3 or higher

Studio Art Drawing

1 tested

0.0%

scored 3 or higher

Other

Language and Comp

45 tested

64.4%

scored 3 or higher

Literature and Comp

37 tested

81.1%

scored 3 or higher

Studio Art 2d Design

11 tested

72.7%

scored 3 or higher

U S Government and Politics

18 tested

88.9%

scored 3 or higher

World History

80 tested · Grade 10

67.5%

scored 3 or higher

New York Regents Exams

4 courses reported · 2024-25

End-of-course exams required for a New York Regents diploma. Each row shows the cohort size and the share of students scoring at the proficient level or higher.

Course	Students tested	% proficient
Math	173	62.0%
Social Studies	166	92.0%
Ela	165	98.0%
Science	21	57.0%

Graduation rate (ACGR) reflects the federally published Adjusted Cohort Graduation Rate for the most recent year available. We refresh this data annually at the close of each academic year in June. The federal source publishes a banded rate (for example, "90-94%") instead of an exact number for cohorts small enough to risk identifying individual students. The state distribution chart, where shown, plots every school in the state with a published rate or band; schools whose rate is federally suppressed are excluded. Where the federal source publishes a band rather than an exact rate, the school is placed within its band using a stable, ID-derived offset, so its position is consistent across visits.