Arapahoe High School
Centennial, CO · High School · Grades 9-12
Arapahoe High School is a high school in Centennial, CO with 1,820 students enrolled and a 67% proficiency rate. Part of Littleton School District No. 6 in the county of Arapahoe. NCES data from the U.S. Department of Education.
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About This School
Arapahoe High School is a high school located in Centennial, Colorado. The school serves 1,820 students in grades 9-12. The student-to-teacher ratio is 21.9:1.
According to EDFacts assessment data, 67% of students meet grade-level proficiency standards in combined math and reading. The school reports a 92% graduation rate.
8% of students qualify for free or reduced-price lunch.
Arapahoe High School is part of the Littleton School District No. 6 in the county of Arapahoe in Colorado.
How This School Compares
Arapahoe High School has 1,820 students enrolled, making it larger than the average school in Littleton School District No. 6 in the county of Arapahoe (611 students). Its 67% proficiency rate is 7 percentage points above the district average of 60%. Compared to the Colorado state average of 51%, the school performs 16 points higher. The 21.9:1 student-teacher ratio is above the national average of 16:1.
Other Schools in Littleton School District No. 6 in the county of Arapahoe
Frequently Asked Questions
Arapahoe High School has 1,820 students enrolled in grades 9-12. The student-to-teacher ratio is 21.9:1.
According to EDFacts data, 67% of students at Arapahoe High School meet grade-level proficiency standards in combined math and reading assessments.
Arapahoe High School has a 92% graduation rate, measuring the percentage of students who graduate within four years.
Arapahoe High School is part of the Littleton School District No. 6 in the county of Arapahoe in Centennial, Colorado. 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.
The this entity record above pulls directly from NCES Common Core of Data and EDFacts. What follows is the per-entity context — how this entity sits in the broader U.S. K-12 school outcomes and enrollment distribution and which underlying factors drive the headline numbers.
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.
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.
Source: NCES Common Core of Data, 2026.