Johnston Senior High School
Johnston, IA · High School · Grades 10-12
Johnston Senior High School is a high school in Johnston, IA with 1,790 students enrolled and a 56% proficiency rate. Part of Johnston Comm School District. NCES data from the U.S. Department of Education.
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About This School
Johnston Senior High School is a high school located in Johnston, Iowa. The school serves 1,790 students in grades 10-12. The student-to-teacher ratio is 20.1:1.
According to EDFacts assessment data, 56% of students meet grade-level proficiency standards in combined math and reading. The school reports a 86% graduation rate.
23% of students qualify for free or reduced-price lunch.
Johnston Senior High School is part of the Johnston Comm School District in Iowa.
How This School Compares
Johnston Senior High School has 1,790 students enrolled, making it larger than the average school in Johnston Comm School District (929 students). Its 56% proficiency rate is 5 percentage points below the district average of 61%. Compared to the Iowa state average of 53%, the school performs 2 points higher. The 20.1:1 student-teacher ratio is above the national average of 16:1.
Frequently Asked Questions
Johnston Senior High School has 1,790 students enrolled in grades 10-12. The student-to-teacher ratio is 20.1:1.
According to EDFacts data, 56% of students at Johnston Senior High School meet grade-level proficiency standards in combined math and reading assessments.
Johnston Senior High School has a 86% graduation rate, measuring the percentage of students who graduate within four years.
Johnston Senior High School is part of the Johnston Comm School District in Johnston, Iowa. 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.