Summary
Hartford High is a 9–12 public high school in Hartford, WI, serving 1,324 students as the high school for the Hartford Union High School School District, which ranks 152nd of 432 Wisconsin districts (65th percentile, 3 stars). The school currently ranks 184th of 533 schools — also 65th percentile, 3 stars. Rank history shows a generally 3-star, mid-to-upper-middle performer with one recent 4-star year: 97th of 431 (77th percentile) in 2024–25, 161st of 431 in 2023–24, and 207th of 390 (2 stars) in 2020–21.
Academically, Hartford beats state averages on ACT English (54.43% vs. 48.47%), math (51.07% vs. 42.93%), and science (51.83% vs. 43.20%), but social studies is the clear weak spot: 41.92% proficiency, below the state's 48.25% and the lowest among nearby comparison schools. Just 5.39 miles away, Slinger High posts far higher 2025–26 results (ELA 70.27%, math 69.50%, science 59.07%, social studies 63.36%) while spending less per student. Hartford also trails Arrowhead High, Hamilton High, Germantown High, Oconomowoc High, and East High on most measures, while besting West High in ELA and science. All four subject scores fell from 2024–25, when social studies was 51.19% and ELA 58.46%, which helps explain the slip from the 77th to the 65th percentile.
Hartford's 96.8% graduation rate and 0.6% dropout rate both beat state figures (92.0% and 1.1%), though nearby schools such as Slinger (99.2%), Hamilton (98.5%), and Arrowhead (98.1%) are higher. Chronic absenteeism stands out at 18.3%, above the state's 17.3% and far above Slinger's and Arrowhead's 4.6%. Subgroup results show progress for special education students (79th percentile, 4 stars, up from 47th) but gaps for low-income students (46th percentile) and English learners (38th percentile), both below the school's overall 65th percentile. With $14,345 per student, a 16.6 student-teacher ratio, and 23.34% free/reduced lunch, Hartford is mid-range in resources. Overall, this is a capable, above-state school with clear priorities in social studies, attendance, and subgroup support.
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