Williamsville South High School, Williamsville NY

Original Research by School Decision on Williamsville South High School

Williamsville South High School is a mid-sized suburban high school on Main Street in Williamsville, New York, serving grades nine through twelve. The school enrolls students drawn largely from a white-majority community, with Asian, Hispanic, and Black students each representing smaller shares. About a quarter of students qualify for free or reduced-price lunch, a rate somewhat above the midpoint among Erie County districts.

The school occupies Main Street near the heart of Williamsville, a historically walkable village nestled about eight miles northeast of downtown Buffalo. The village centers on preserved 19th-century mill architecture and a mixed-use Main Street corridor with independent shops, restaurants, and services alongside national chains. This location distinguishes Williamsville South from its two sister high schools in the district, North and East, which sit on suburban campuses farther from the village core. The village itself is comparatively dense for a Buffalo suburb, with six parks packed into a single square mile, strong walkability, and reliable bus transit to University Metro Rail Station downtown.

Housing around Williamsville South reflects an older, more settled suburban pattern. Home values sit at a moderate level for the region, and the market has seen recent infill development—notably new multifamily affordable housing on Main Street completed in early 2026, plus mixed-use buildings and apartments aimed at downsizers. Single-family construction in the area prices into the high hundreds of thousands. The broader housing market in the Williamsville area shows moderately elevated supply and demand scores, with listings turning over fairly quickly. Mortgage rates and rental costs are in line with national and state benchmarks.

The Williamsville Central School District spans a mid-sized service area across Williamsville, Amherst, Cheektowaga and Clarence. Two recent district developments affect the school's operating environment. The first is a multi-phase air-conditioning capital project for elementary schools running through 2027-28, funded through capital reserves without raising the tax rate; this is a lasting facility upgrade. The second is the recent townwide property reassessments in Amherst and Clarence, which moved those towns to full market-value equalization. This reshaped how school tax bills are distributed, with individual homeowners' bills rising, falling, or staying flat depending on their new assessments. The district also rejected a proposal to shift high school start times later, so existing schedules remain in place.

State testing data was not available for this school, and civil-rights data on discipline, attendance, or special-population enrollment rates were not provided. A parent may want to look into the school's academic profile, course offerings, and outcomes directly with the school. Similarly, the school's graduation rate and proficiency levels are not in the available data, so those metrics warrant a direct conversation with the school or district.

The school's peer environment and location on Main Street, within a compact and walkable village with lower density than typical suburbs, shape the experience distinctly. Families considering Williamsville South might evaluate it through the lens of place—a village-integrated high school with a settled, family-oriented peer base—as well as academic program and outcomes, which the school should be able to detail.

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Academic performance

How students graduate and prepare for what comes next.

Graduation rate (ACGR)

94.0%Cohort of 227 students · Class of 2021

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

18 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

18 tested

94.4%

scored 3 or higher

Calculus BC

3 tested

0.0%

scored 3 or higher

Computer Science Principles

24 tested · Grade 9, Grade 10

79.2%

scored 3 or higher

Precalculus

27 tested

88.9%

scored 3 or higher

Statistics

19 tested · Grade 9

73.7%

scored 3 or higher

Sciences

Biology

25 tested

84.0%

scored 3 or higher

Chemistry

6 tested

0.0%

scored 3 or higher

Environmental Science

22 tested

81.8%

scored 3 or higher

Physics 2

12 tested

66.7%

scored 3 or higher

History and Social Sciences

European History

16 tested · Grade 10

68.8%

scored 3 or higher

Macroeconomics

19 tested

84.2%

scored 3 or higher

Psychology

27 tested · Grade 10

66.7%

scored 3 or higher

U.S. History

94 tested

76.6%

scored 3 or higher

Arts

Music Theory

8 tested

87.5%

scored 3 or higher

Other

Language and Comp

56 tested · Grade 10

55.4%

scored 3 or higher

Literature and Comp

10 tested

70.0%

scored 3 or higher

U S Government and Politics

51 tested

92.2%

scored 3 or higher

World History

94 tested · Grade 10

70.2%

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
Social Studies	225	93.0%
Ela	217	94.0%
Science	150	62.0%
Math	143	85.0%

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.