Grafton High School is a secondary school in Grafton, Wisconsin. It is part of the Grafton School District. The only public high school in Grafton, it has a student enrollment of around 700.
Serving 727 students in grades 9-12, Grafton High School ranks in the top 30% of all schools in Wisconsin for overall test scores (math proficiency is top 50%, and reading proficiency is top 50%).
The percentage of students achieving proficiency in math is 45-49% (which is higher than the Wisconsin state average of 40%). The percentage of students achieving proficiency in reading/language arts is 50-54% (which is higher than the Wisconsin state average of 38%).
The student-teacher ratio of 15:1 is higher than the Wisconsin state level of 13:1.
Minority enrollment is 18% of the student body (majority Hispanic and Asian), which is lower than the Wisconsin state average of 34% (majority Hispanic).
Quick Facts (2026)
- Grades: 9-12
- Enrollment: 727 students
- Student-Teacher Ratio: 15:1
- Minority Enrollment: 18%
- Graduation Rate: ≥95% (Top 10% in WI)
- Overall Testing Rank: Top 30%
- Math Proficiency: 45-49% (Top 50%)
- Reading Proficiency: 50-54% (Top 20%)
- Science Proficiency: 45-49% (Btm 50%)
- Source: National Center for Education Statistics (NCES), WI Dept. of Education
Top Rankings
Grafton High School ranks among the top 20% of public schools in Wisconsin for:
Category
Attribute
Reading/Language Arts Proficiency
Graduation Rate
School Overview
Grafton High School's student population of 727 students has grown by 5% over five school years.
The teacher population of 47 teachers has grown by 6% over five school years.
Grades Offered
Grades 9-12
(Supplemental Virtual)
(Supplemental Virtual)
Total Students
727 students
Total Classroom Teachers
47 teachers
Year Founded
1956
School Rankings
Grafton High School ranks within the top 30% of all 1,962 schools in Wisconsin (based off of combined math and reading proficiency testing data).
The diversity score of Grafton High School is 0.32, which is less than the diversity score at state average of 0.54. The school's diversity has stayed relatively flat over five school years.
Overall Testing Rank
#427 out of 1962 schools
(Top 30%)
(Top 30%)
Math Test Scores (% Proficient)
45-49%
40%
Reading/Language Arts Test Scores (% Proficient)
50-54%
38%
Science Test Scores (% Proficient)
45-49%
44%
Student-Teacher Ratio
15:1
13:1
American Indian
n/a
1%
Asian
5%
4%
Hispanic
6%
14%
Black
3%
9%
White
82%
66%
Hawaiian
n/a
n/a
Two or more races
4%
6%
All Ethnic Groups
Graduation Rate
≥95%
90%
Participates in the National School Lunch Program (NSLP)
Yes
Eligible for Free Lunch
13%
36%
Eligible for Reduced Lunch
2%
4%
School Statewide Testing
School District Name
Source: National Center for Education Statistics (NCES), WI Dept. of Education
Frequently Asked Questions
What is Grafton High School's ranking?
Grafton High School is ranked #427 out of 1,962 schools, which ranks it among the top 30% of public schools in Wisconsin.
What schools are Grafton High School often compared to?
Grafton High Schoolis often viewed alongside schools like Cedarburg High School, Homestead High School by visitors of our site.
What percent of students have achieved state testing proficiency in math and reading?
45-49% of students have achieved math proficiency (compared to the 40% WI state average), while 50-54% of students have achieved reading proficiency (compared to the 38% WI state average).
What is the graduation rate of Grafton High School?
The graduation rate of Grafton High School is 95%, which is higher than the Wisconsin state average of 90%.
How many students attend Grafton High School?
727 students attend Grafton High School.
What is the racial composition of the student body?
82% of Grafton High School students are White, 6% of students are Hispanic, 5% of students are Asian, 4% of students are Two or more races, and 3% of students are Black.
What is the student-teacher ratio of Grafton High School?
Grafton High School has a student ration of 15:1, which is higher than the Wisconsin state average of 13:1.
What grades does Grafton High School offer ?
Grafton High School offers enrollment in grades 9-12 (Supplemental Virtual).
What school district is Grafton High School part of?
Grafton High School is part of Grafton School District.
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