Summary:
Hartford Union High School School District is a single-school union high school district in Wisconsin, serving grades 9–12 at one campus, Hartford High, with 1,324 students. Because the district contains only this one school, district and school figures are the same for graduation, dropout, absenteeism, and test scores. It is a moderately sized school community: 23.34% of students qualify for free or reduced-price lunch, per-student spending is $14,345, and the student-teacher ratio is 16.6, which works out to roughly 80 teachers.
Hartford High's clearest strengths are in completion. Its graduation rate is 96.8%, well above Wisconsin's 92.0%, and its dropout rate is 0.6%, about half the state's 1.1%. On the ACT, students performed above the state average in English language arts (54.43% proficient vs. 48.47%), mathematics (51.07% vs. 42.93%), and science (51.83% vs. 43.20%). Overall, the school and district are rated 3 stars and sit at the 65th percentile — 152nd of 432 districts and 184th of 533 schools in 2025–2026.
The latest data also show areas to watch. Proficiency declined in all four tested subjects from 2024–2025 to 2025–2026. Social studies is the sharpest concern: the Forward Exam rate fell from 51.19% to 41.92%, shifting from above the state average to 6.33 points below it. Chronic absenteeism, at 18.3%, is 1.0 point above the state's 17.3%. The overall rating also slipped from 4 stars and the 77th percentile in 2024–2025 to 3 stars and the 65th percentile in 2025–2026, though the number of schools used for comparison changed between those years.
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