Centennial High
Ellicott City, MD · High School · Grades 9-12
Centennial High is a high school in Ellicott City, MD with 1,392 students enrolled and a 70% proficiency rate. Part of Howard County Public Schools. NCES data from the U.S. Department of Education.
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About This School
Centennial High is a high school located in Ellicott City, Maryland. The school serves 1,392 students in grades 9-12. The student-to-teacher ratio is 16.8:1.
According to EDFacts assessment data, 70% of students meet grade-level proficiency standards in combined math and reading. The school reports a 80% graduation rate.
17% of students qualify for free or reduced-price lunch.
Centennial High is part of the Howard County Public Schools in Maryland.
How This School Compares
Centennial High has 1,392 students enrolled, making it larger than the average school in Howard County Public Schools (759 students). Its 70% proficiency rate is 12 percentage points above the district average of 58%. Compared to the Maryland state average of 49%, the school performs 21 points higher.
Frequently Asked Questions
Centennial High has 1,392 students enrolled in grades 9-12. The student-to-teacher ratio is 16.8:1.
According to EDFacts data, 70% of students at Centennial High meet grade-level proficiency standards in combined math and reading assessments.
Centennial High has a 80% graduation rate, measuring the percentage of students who graduate within four years.
Centennial High is part of the Howard County Public Schools in Ellicott City, Maryland. You can view all schools in this district on the district page.
All data on this page comes from the National Center for Education Statistics (NCES) Common Core of Data and EDFacts assessment results. These are official federal datasets published by the U.S. Department of Education.
School profiles are built from NCES directory data and EDFacts assessment results. Proficiency rates reflect combined math and reading performance. Graduation rates are reported for high schools with available data.
this entity is one of the data points covered by this site’s U.S. K-12 school outcomes and enrollment dataset. The detail above comes directly from NCES Common Core of Data and EDFacts; the context that follows situates the headline numbers against the broader distribution across U.S. public schools and districts.
Every number on this page links back to NCES Common Core of Data and EDFacts; the methodology page describes the inputs, refresh cadence, and known limitations of the underlying data product.
For readers using this page as a decision input, the related-entity pages elsewhere on the site provide the comparison set. The most useful comparison for this entity is typically a peer within U.S. public schools and districts with similar size, similar exposure, or similar geography — not the national-level summary alone.
Source: NCES Common Core of Data, 2026.