Johnston High School is a public secondary school located in Johnston, Iowa. It is part of the Johnston Community School District. The school serves approximately 1,800 students in grades 10 through 12. Freshman students attend Johnston Middle School.
Serving 1,771 students in grades 10-12, Johnston Senior High School ranks in the top 50% of all schools in Iowa for overall test scores (math proficiency is top 30%, and reading proficiency is top 30%).
The percentage of students achieving proficiency in math is 77% (which is higher than the Iowa state average of 68%). The percentage of students achieving proficiency in reading/language arts is 74% (which is higher than the Iowa state average of 70%).
The student-teacher ratio of 21:1 is higher than the Iowa state level of 14:1.
Minority enrollment is 32% of the student body (majority Black and Hispanic), which is higher than the Iowa state average of 29% (majority Hispanic and Black).
Quick Facts (2025)
- Grades: 10-12
- Enrollment: 1,771 students
- Student-Teacher Ratio: 21:1
- Minority Enrollment: 32%
- Graduation Rate: 97% (Top 1% in IA)
- Overall Testing Rank: Top 50%
- Math Proficiency: 77% (Top 30%)
- Reading Proficiency: 74% (Top 50%)
- Science Proficiency: 69% (Top 50%)
- Source: National Center for Education Statistics (NCES), IA Dept. of Education
Top Rankings
Johnston Senior High School ranks among the top 20% of public schools in Iowa for:
Category
Attribute
Graduation Rate
School Overview
Johnston Senior High School's student population of 1,771 students has grown by 6% over five school years.
The teacher population of 85 teachers has stayed relatively flat over five school years.
Grades Offered
Grades 10-12
(Supplemental Virtual)
(Supplemental Virtual)
Total Students
1,771 students
Gender %
Total Classroom Teachers
85 teachers
Colors
Purple, Gold
School Calendar
School Rankings
Johnston Senior High School ranks within the top 50% of all 1,223 schools in Iowa (based off of combined math and reading proficiency testing data).
The diversity score of Johnston Senior High School is 0.52, which is more than the diversity score at state average of 0.47. The school's diversity has stayed relatively flat over five school years.
Overall Testing Rank
#432 out of 1223 schools
(Top 50%)
(Top 50%)
Math Test Scores (% Proficient)
77%
68%
Reading/Language Arts Test Scores (% Proficient)
74%
70%
Science Test Scores (% Proficient)
69%
63%
Student-Teacher Ratio
21:1
14:1
American Indian
n/a
n/a
Asian
8%
3%
Hispanic
8%
13%
Black
11%
7%
White
68%
71%
Hawaiian
n/a
1%
Two or more races
5%
5%
All Ethnic Groups
Graduation Rate
97%
90%
Participates in the National School Lunch Program (NSLP)
Yes
Eligible for Free Lunch
22%
36%
Eligible for Reduced Lunch
3%
5%
School Statewide Testing
School District Name
Source: National Center for Education Statistics (NCES), IA Dept. of Education
School Notes
- School Mascot: Dragon
Profile last updated: 02/09/2025
Frequently Asked Questions
What is Johnston Senior High School's ranking?
Johnston Senior High School is ranked #432 out of 1,223 schools, which ranks it among the top 50% of public schools in Iowa.
What schools are Johnston Senior High School often compared to?
Johnston Senior High Schoolis often viewed alongside schools like Dallas Center-grimes High School by visitors of our site.
What percent of students have achieved state testing proficiency in math and reading?
77% of students have achieved math proficiency (compared to the 68% IA state average), while 74% of students have achieved reading proficiency (compared to the 70% IA state average).
What is the graduation rate of Johnston Senior High School?
The graduation rate of Johnston Senior High School is 97%, which is higher than the Iowa state average of 90%.
How many students attend Johnston Senior High School?
1,771 students attend Johnston Senior High School.
What is the racial composition of the student body?
68% of Johnston Senior High School students are White, 11% of students are Black, 8% of students are Asian, 8% of students are Hispanic, and 5% of students are Two or more races.
What is the student-teacher ratio of Johnston Senior High School?
Johnston Senior High School has a student ration of 21:1, which is higher than the Iowa state average of 14:1.
What grades does Johnston Senior High School offer ?
Johnston Senior High School offers enrollment in grades 10-12 (Supplemental Virtual).
What school district is Johnston Senior High School part of?
Johnston Senior High School is part of Johnston Comm School District.
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