Summary:
ZIP code 53228 contains exactly one high school — Whitnall High, serving grades 9–12 with 821 students in Greenfield, Wisconsin, as part of the Whitnall School District. Because it is the only high school in the area, there are no other local schools to compare it against, so the most useful benchmarks are the district and the state of Wisconsin.
Whitnall High looks strong on the outcomes parents tend to watch most. Its graduation rate is 97.0% versus 92.0% statewide, its dropout rate is just 0.2% against the state's 1.1%, and chronic absenteeism is 13.4% compared with 17.3% statewide. Test proficiency is above the state average in all four tested subjects in both 2025–2026 and 2024–2025. In the most recent year, the largest margins are in Science (+6.07 percentage points) and Mathematics (+4.39 points), with Social Studies +2.28 points and English Language Arts the narrowest at +0.80 points. Social Studies improved year over year, rising from 49.02% to 50.53%.
Two items deserve attention. ELA proficiency fell sharply, from 65.34% to 49.27% — a 16.07-point drop — while the state average was nearly flat, so this is not a statewide pattern; the school still sits slightly above the state. Math and Science also slipped modestly (−1.54 and −1.87 points) but remain comfortably above state averages. Meanwhile, the school's state rank moved from the 72nd percentile with 4 stars in 2024–2025 to the 63rd percentile with 3 stars in 2025–2026 (199th of 533). The district overall ranks 60th of 432 districts, at the 86th percentile with 4 stars. For context, 28.5% of students qualify for free/reduced lunch, per-student spending is $14,035, and the student-teacher ratio is 14.2; the data offers no state comparisons for those figures.
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