New York City Geographic District #21
Brooklyn, NY · 40 schools · 33,390 students
Largest Schools
Schools ranked by enrollment. Proficiency data from EDFacts where available.
Other Districts in New York
74 schools · 56,788 students · 43% proficiency
118 schools · 54,297 students · 46% proficiency
57 schools · 49,065 students · 38% proficiency
45 schools · 44,161 students · 39% proficiency
Frequently Asked Questions
New York City Geographic District #21 has 40 schools serving 33,390 students. The average proficiency rate across the district is 39%. The average graduation rate is 73%.
New York City Geographic District #21 operates 40 public schools, including Edward R Murrow High School, John Dewey High School, Abraham Lincoln High School, Is 228 David A Boody, Is 98 Bay Academy and others. The full school list is shown above with enrollment and grade-level details.
The average graduation rate across high schools in New York City Geographic District #21 is approximately 73% (EDFacts district-level data, most recent reporting year). Individual school graduation rates may vary; this is a district-wide adjusted-cohort graduation rate.
The largest school in New York City Geographic District #21 is Edward R Murrow High School with 3,639 students.
New York City Geographic District #21 serves 33,390 students across 40 schools in NY, per the latest NCES Common Core of Data enrollment.
New York City Geographic District #21's average proficiency rate of 39% (math and reading combined, EDFacts) is below average and may indicate room for improvement. "Good" depends on what you value — proficiency is one signal; enrollment trends, class size, graduation rates, and district resources also matter. Check individual school pages for granular data.
Student-teacher ratios are reported at the school level by NCES, not aggregated at the district level in our dataset. Open any individual school page in New York City Geographic District #21 to see its specific student-teacher ratio. The US national average is approximately 16:1 for public schools.
All data comes from the National Center for Education Statistics (NCES) Common Core of Data (enrollment, school count, demographics) and EDFacts assessment results (proficiency rates, graduation rates). Proficiency and graduation rates are reported at the district level. Both are federal sources used by the US Department of Education.
School performance data is sourced from NCES enrollment records and EDFacts proficiency and graduation rate assessments.
For this entity, the underlying data on this page comes from NCES Common Core of Data and EDFacts. The breakdown above is the federal record; the paragraphs below add the per-entity context that makes the headline numbers usable for a real decision rather than just a data lookup.
The methodology behind every numeric value on this page is publicly documented on the NCES Common Core of Data and EDFacts portal and described in detail on this site’s methodology page. Refresh cadence varies by underlying series; the page surfaces the as-of date for each number so readers can trace any figure back to the source release.
Practical use of this page is in combination with the comparison and ranking pages elsewhere on the site, which surface the same data for this entity’s peers within U.S. public schools and districts. A single-entity reading without peer context can be misleading when an entity is an outlier on one axis but typical on another.