Summary:
ZIP code 54455 covers Mosinee, Wisconsin, where three public schools serve students from pre-kindergarten through 12th grade: Mosinee Elementary (PK–3), Mosinee Middle (grades 4–8), and Mosinee High (grades 9–12), enrolling 1,865 students combined. All three belong to the Mosinee School District, which ranks 198th of 432 districts in Wisconsin — the 54th percentile, with 3 stars.
Mosinee High is the standout. In 2025–2026 it ranked 104th of 533 high schools, the 80th percentile with 4 stars. Its graduation rate is 97.4% (state 92.0%) and its dropout rate 0.0% (state 1.1%). ACT results beat state: ELA 64.35% vs. 48.47%, math 56.52% vs. 42.93%, and science 56.52% vs. 43.2%. It also spends the most per student ($15,899) and has the lowest student-teacher ratio (12.5). Mosinee Elementary has the lowest chronic absenteeism in the ZIP code at 8.8%, and its third-grade scores improved: ELA from 47.22% to 59.13% and math from 52.78% to 56.90%, both now above state. Mosinee Middle is a math standout, with 6th-grade math at 68.7%, 7th-grade at 68.18%, and 8th-grade at 62.5% — all well above state.
The clearest weakness is middle-grade reading: 4th-grade ELA at 42.07% vs. 53.87% state, and 6th-grade ELA at 38.17% vs. 54.95%. Both ranked schools have slipped from their 2023–2024 peaks — Middle from 74th percentile/4 stars to 64th percentile/3 stars, and High from 91st percentile/5 stars to 80th percentile/4 stars — though both remain above the district average. Chronic absenteeism is a district strength, with the high school at 12.4%, middle at 9.3%, and elementary at 8.8%, all under the state's 17.3%, though the high school is above the district's 9.9%. Notably, the middle school has the lowest per-student spending ($13,114) and the largest classes (14.0 students per teacher) yet strong math results, showing that resources alone do not determine outcomes.
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