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Enrollment
846
High
DISTRICT 389 · STATE 668
SCHOOL COMMUNITY·LYNBROOK UNION FREE SCHOOL DISTRICT·NCES 361791001606
LYNBROOK SENIOR HIGH SCHOOL
9 UNION AVE, LYNBROOK, NY 11563 · (516) 887-0200 · Nassau County
GRADES 09–12HIGH21-SUBURBREGULAR SCHOOL846 STUDENTS
A+
allk12 Grade
Scored higher than 95% of New York public high schools
- A+Test scores Share of students meeting the state standard in reading, math, and other tested subjects, 2023-24 and 2024-25.
- ABeats expectations How far test scores land above or below what the share of low-income students predicts for a school in this state.
- ·Three-year trend Not available for this school, so the grade uses the other parts.
Grades compare a school only with schools in the same state, because every state gives its own test. How grades work · Top-graded New York public high schools
Student : Teacher
10.3:1
82 FTE teachers
DISTRICT 9.8:1 · STATE 11.0:1
Free / Reduced Lunch
19%
160 students
DISTRICT 16% · STATE 58%
Community
1
0 members
Enrollment and student:teacher ratio compared against other high schools. Free/Reduced Lunch and demographics compared against all schools.
Enrollment by grade, 2024-25
| Grade | Students | Share |
|---|---|---|
| Grade 9 | 214 | 25% |
| Grade 10 | 202 | 24% |
| Grade 11 | 210 | 25% |
| Grade 12 | 219 | 26% |
| Ungraded | 1 | 0% |
Student demographics
56%Diversity index
The chance that two students picked at random belong to different racial or ethnic groups.
DISTRICT 57% · STATE 72% · US 70%
Student head counts by race/ethnicity from federal NCES enrollment data. District, state, and US figures are each group's share of all public school students in that area (US excludes territories). Very small groups may be suppressed in the source, so categories do not always sum exactly to total enrollment.
Gender split
School pathway
Based on grade levels within LYNBROOK UNION FREE SCHOOL DISTRICT. Attendance zones can vary; confirm enrollment with the district.
Test scores
NYS Assessments 2024-25 . % Proficient (Level 3 + Level 4)English Language Arts
94.0%
NY avg 58.3% . -1.0pp since 2023
Math
89.0%
NY avg 57.4% . +0.0pp since 2023
What this means: On the NYS Assessments, New York's statewide test, about 94 of every 100 students at this school read and write at grade level and about 89 of 100 do math at grade level. Across all New York schools, those numbers are about 58 and 57. Reading and writing scores are down about 1 points since 2023, while math scores have held steady.
NYS Assessments results by year
| School year | English Language Arts | Math |
|---|---|---|
| 2024-25 | 94.0% | 89.0% |
| 2023-24 | 95.0% | 89.0% |
% Proficient (Level 3 + Level 4), all students and all tested grades.
Source: NYS Assessments. All students, all grades. See all years and grades →
BeatsExpectations
Demographically-adjusted score · methodologyTier
OUTPERFORMING
Top 10% of NY schools after controlling for student poverty
Actual proficiency
92.0%
composite math + reading, all grades
Predicted
68.0%
based on NY schools with similar FRL share
Beats by
+24.0pp
above demographic expectation
What this means: About 92% of students here test proficient in math and reading, well above the roughly 68% typical for New York schools with a similar share of low-income students. BeatsExpectations ranks schools against others at the same poverty level, not by raw scores, so a school can post high scores and still fall short of its prediction, or post lower scores and still beat it. This school clears its prediction by about 24 points, placing it in New York's top 10%.
BeatsExpectations runs a per-state regression of proficiency on free/reduced-lunch share, then scores each school by residual. How this is calculated →
Schools most like LYNBROOK SENIOR HIGH SCHOOL
LYNBROOK SENIOR HIGH SCHOOL's state test result (92.0% proficient) is higher than 4 of the 5 schools below with a result.
| School | Students | Low-income | Proficient |
|---|---|---|---|
| LYNBROOK SENIOR HIGH SCHOOL this school | 846 | 18.9% | 92.0% |
| HARBORFIELDS HIGH SCHOOL GREENLAWN | 923 | 21.1% | 93.2% |
| PELHAM MEMORIAL HIGH SCHOOL PELHAM | 852 | 15.5% | 79.2% |
| CORNWALL CENTRAL HIGH SCHOOL NEW WINDSOR | 1,010 | 21.2% | 78.5% |
| HAUPPAUGE HIGH SCHOOL HAUPPAUGE | 1,038 | 20.4% | 88.8% |
| SOUTH SIDE HIGH SCHOOL ROCKVILLE CENTRE | 959 | 20.6% | 77.2% |
Matched among New York high schools on enrollment, the share of students from low-income families (eligible for free or reduced-price lunch), and racial and ethnic makeup. Proficient is the average share of students meeting the state standard across all of the school's state tests in 2023-24 and 2024-25, the same combined score our test-score rankings use. Online schools and schools serving specialized populations are not matched.
Where LYNBROOK SENIOR HIGH SCHOOL ranks
Among high schools| Measure | This school | In New York | In Nassau County |
|---|---|---|---|
| State test proficiency ranked highest first | 92.0% | #44 of 1,135 | #10 of 57 |
| Math proficiency ranked highest first | 89.0% | #55 of 1,109 ▲ 56 | #12 of 57 ▲ 9 |
| Reading proficiency ranked highest first | 94.0% | #100 of 1,135 ▲ 20 | #20 of 56 no change |
| Enrollment ranked largest first | 846 | #303 of 1,216 | #44 of 59 |
| Students per teacher ranked fewest first | 10.3:1 | #379 of 1,058 | #12 of 57 |
| Diversity index ranked most diverse first | 55.9% | #354 of 1,070 | #28 of 57 |
| Free and reduced lunch ranked highest share first | 18.9% | #1,104 of 1,167 | #40 of 57 |
| Enrollment change since 2017-18 ranked steepest decline first | -5.1% | #600 of 743 | #23 of 34 |
Ranked against other public high schools. Online schools are left out of every list, and test-score lists leave out schools that serve specialized populations. Each rank links to the full list. Arrows under a test-score rank show places moved since the prior test year, among schools tested both years.
4-year change
SY 2020-21 vs SY 2024-25Enrollment
846
-44 (-5%) vs 2020
+13% since 1990-91, when it was 750
Student : Teacher
10.3:1
was 11.0:1
Source: NCES Common Core of Data
Enrollment and staffing by year
| School year | Students | Teachers (FTE) | Students per teacher | Free and reduced lunch |
|---|---|---|---|---|
| 2024-25 | 846 | 82 | 10.3:1 | 19% (160) |
| 2023-24 | 835 | 81.2 | 10.3:1 | 19% (158) |
| 2022-23 | 850 | 83.1 | 10.2:1 | 19% (164) |
| 2020-21 | 890 | 81 | 11.0:1 | 20% (182) |
| 2017-18 | 891 | 75.4 | 11.8:1 | 14% (128) |
| 2015-16 | 915 | 75 | 12.2:1 | 13% (121) |
| 2010-11 | 982 | 70 | 14.0:1 | 3% (30) |
| 2000-01 | 842 | 55 | 15.3:1 | 0% (0) |
| 1990-91 | 750 | 58 | 12.9:1 | N/A |
Source: NCES Common Core of Data. Rows are the federal collections on file for LYNBROOK SENIOR HIGH SCHOOL.
About LYNBROOK SENIOR HIGH SCHOOL
LYNBROOK SENIOR HIGH SCHOOL is a mid-sized high school for students in LYNBROOK, New York. Its grade span covers grades 9 through 12, with 846 students on the rolls. Across high schools in New York, the average enrollment is about 668.
LYNBROOK UNION FREE SCHOOL DISTRICT (7 schools, 2,725 students) runs LYNBROOK SENIOR HIGH SCHOOL.
More than half of enrollment at LYNBROOK SENIOR HIGH SCHOOL is White: 62%. The remaining shares are 20% Hispanic, 8% Black, 7% Asian, and 2% multiracial. On the diversity index, which measures the chance that two random students are from different groups, LYNBROOK SENIOR HIGH SCHOOL scores 56%.
Staffing at LYNBROOK SENIOR HIGH SCHOOL comes to 82 full-time-equivalent teachers, or 10.3:1. High schools in New York have an average ratio of 11.0:1. On the income side, 19% of students qualify for free or reduced-price lunch. That is lower than the 31% average for public schools in Nassau County.
LYNBROOK SENIOR HIGH SCHOOL holds an A+ allk12 Grade, placing it above 95% of New York public high schools.
On a poverty-adjusted basis, LYNBROOK SENIOR HIGH SCHOOL is in the top 10% of New York schools: 92.0% actual against 68.0% predicted.
Looking at the county, Nassau County, the median household earns about $146,202 a year, the share of adults with a bachelor's degree or higher is 50%, and roughly 4% of residents are in poverty. Nassau County has 315 public schools with about 200,775 students, including LYNBROOK SENIOR HIGH SCHOOL.
KINDERGARTEN CENTER sits less than a tenth of a mile from LYNBROOK SENIOR HIGH SCHOOL. Inside a five-mile radius, there are at least 8 other public schools. The school's 92.0% average proficiency ranks 1st among 8 nearby schools.
In the federal locale system, LYNBROOK SENIOR HIGH SCHOOL is coded Suburb: Large, for schools in a suburban area outside a principal city, within an urbanized area with a population of 250,000 or more.
The school shrank from 890 students in 2020-21 to 846 in 2024-25.
Use the discussion section to ask about special education services, counseling, and support programs at LYNBROOK SENIOR HIGH SCHOOL. You can also rate the school on this page.
Nassau County at a glance
View full county profilePopulation
1,389,591
Census ACS
Median income
$146,202
Household, ACS
Bachelor's+
50%
Adults 25+
Poverty rate
4%
Below federal line
Schools in county
315
200,775 students
Quick facts
Related schools
Other schools in LYNBROOK UNION FREE SCHOOL DISTRICT
- MARION STREET SCHOOLElementary · 435 students
- LYNBROOK SOUTH MIDDLE SCHOOLMiddle · 414 students
- WEST END SCHOOLElementary · 386 students
- LYNBROOK NORTH MIDDLE SCHOOLMiddle · 284 students
- WAVERLY PARK SCHOOLElementary · 197 students
- KINDERGARTEN CENTERElementary · 163 students
Other schools in LYNBROOK
- MARION STREET SCHOOLElementary · 435 students
- LYNBROOK SOUTH MIDDLE SCHOOLMiddle · 414 students
- WEST END SCHOOLElementary · 386 students
- DAVISON AVENUE INTERMEDIATE SCHOOLElementary · 370 students
- LYNBROOK NORTH MIDDLE SCHOOLMiddle · 284 students
- KINDERGARTEN CENTERElementary · 163 students
Nearby schools
- KINDERGARTEN CENTER0.1 mi · 163
- MARION STREET SCHOOL0.6 mi · 435
- LYNBROOK NORTH MIDDLE SCHOOL0.6 mi · 284
- CENTRE AVENUE ELEMENTARY SCHOOL0.6 mi · 239
- WEST END SCHOOL0.7 mi · 386
- LYNBROOK SOUTH MIDDLE SCHOOL0.8 mi · 414
Frequently asked questions
About LYNBROOK SENIOR HIGH SCHOOLWhat is the total enrollment at LYNBROOK SENIOR HIGH SCHOOL?
LYNBROOK SENIOR HIGH SCHOOL enrolls approximately 846 students in grades 09-12.
What grades does LYNBROOK SENIOR HIGH SCHOOL serve?
LYNBROOK SENIOR HIGH SCHOOL serves grades 09-12.
What is the student-teacher ratio at LYNBROOK SENIOR HIGH SCHOOL?
The student-to-teacher ratio at LYNBROOK SENIOR HIGH SCHOOL is approximately 10.3:1 (82 FTE teachers).
What is the racial breakdown of students at LYNBROOK SENIOR HIGH SCHOOL?
At LYNBROOK SENIOR HIGH SCHOOL, the student body is approximately 62% White, 20% Hispanic, 8% Black, 7% Asian, 2% Two or more.
What district is LYNBROOK SENIOR HIGH SCHOOL in?
LYNBROOK SENIOR HIGH SCHOOL is part of LYNBROOK UNION FREE SCHOOL DISTRICT.
Data sourceSchool profile facts are sourced from the NCES. Community content is posted by allk12 members.