Summary
Greendale High is a 9–12 comprehensive high school in Greendale, Wisconsin, a Milwaukee County suburb, serving 882 students as the only high school in the Greendale School District, which ranks among the strongest in the state (41st of 432 districts). The school ranks 57th of 533 Wisconsin high schools (89th percentile, 4 stars) for 2025–2026, with a 99.5% graduation rate compared with 92.0% statewide and a dropout rate of 0.4%.
Compared with nearby schools, Greendale stands out for results relative to its resources. Franklin High spends less ($14,201 per student) and serves a lower-need population (21.9% free/reduced lunch), yet Greendale beats it in every subject — Social Studies 65.82% vs. 55.74%, ELA 60.66% vs. 58.21%, Math 60.19% vs. 56.22%, Science 55.45% vs. 52.24%. Franklin's one edge is attendance: 7.0% chronic absenteeism vs. 13.2%. Whitnall High is a near-twin on paper — 28.5% free/reduced lunch, similar enrollment, $14,035 per student, 13.4% absenteeism — yet scores six to fifteen points lower in every subject. Greenfield High, just 1.67 miles away, ranks 396th of 533 with Math at 26.52%, a 33.7-point gap. Reagan College Preparatory High is the only nearby school matching Greendale, edging it in ELA and Social Studies but trailing in Math and Science.
Two features define Greendale's profile. Special education is a standout strength: those students rank 11th of 333 schools (97th percentile), a sharp recent improvement, and low-income students rank 112th of 446 (75th percentile), up from the 48th percentile two years earlier. The school also spends efficiently — $14,831 per student, far below Milwaukee comparators such as Pulaski High ($19,562) and Hamilton High ($19,450), where math proficiency is under 4%. The clearest weakness is chronic absenteeism at 13.2%, nearly double the district's 7.4% and well above Franklin High's 7.0%. The one subgroup result worth a closer look is African American students, ranked in the bottom quartile for a single year of data.
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