Summary:
The Grafton School District in Wisconsin includes just one high school — Grafton High — serving grades 9–12 with 727 students at 1950 Washington St in Grafton, a suburban community north of Milwaukee. Because it is the only high school in the district, there are no other local high schools to compare it against; the most useful comparisons are to Wisconsin averages and to the school's own prior years. That said, the district as a whole ranks 18th out of 432 Wisconsin districts, placing it in the 96th percentile with 5 stars.
Grafton High stands out on the outcomes parents care about most. Its graduation rate is 99.4%, compared with 92.0% statewide, and its dropout rate is 0.0% versus Wisconsin's 1.1%. Chronic absenteeism is 5.9%, well below the state's 17.3%, though slightly above the district's 4.7%. Test scores are also strong across the board: in 2025–2026, students were proficient at 63.37% in Social Studies, 61.8% in English Language Arts, 66.29% in Mathematics, and 68.54% in Science, topping state averages by roughly 13 to 25 percentage points. The school has held a 5-star rating for three straight years and sits in the 92nd percentile for 2025–2026, ranking 42nd of 533 schools.
The main watch item is a decline in test proficiency from 2024–2025 to 2025–2026. Social Studies fell 13.90 points, English Language Arts 9.71 points, and Science 4.72 points, while Mathematics was nearly flat with a 1.15-point dip. Every subject still remains well above state averages. For context, 15.27% of students qualify for free or reduced lunch, spending is $14,486 per student, and the student-teacher ratio is 15.6 — figures the data presents as descriptive rather than comparative. Overall, this is a top-performing high school with an elite completion record and a recent, modest softening in test results.
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