Schools in Zip Code 53813

ZIP code 53813 covers Lancaster, Wisconsin, where three public schools serve students from pre-kindergarten through 12th grade: Winskill Elementary (PK–5, 435 students), Lancaster Middle (6–8, 231 students), and Lancaster High (9–12, 325 students), all part of the Lancaster Community School District, which is rated 4 stars and ranks 111th of 432 Wisconsin districts, at the 74th percentile. Total enrollment is 991 students, and because the district has one school per grade band, district test results mirror the individual school results.

Winskill Elementary is the strongest overall performer. In 2025–2026 every listed Forward Exam result was above the state average, including 5th grade math at 87.5% proficient (state 51.81%) and 5th grade English language arts at 82.14% (state 53.63%). It also has by far the lowest chronic absenteeism at 5.2% (district 12.4%, state 17.3%) and holds a 4-star rank at the 73rd percentile. Lancaster Middle is the breakout school: its rank climbed from the 55th percentile in 2023–2024 to the 83rd percentile in 2025–2026 with 4 stars, and all eight listed tests beat state averages, including 6th grade math at 84.13% and 8th grade social studies at 80.46% — despite having the lowest per-student spending ($10,693) and the highest student-teacher ratio (15.7).

Lancaster High is more mixed. Its 95.2% graduation rate beats the state's 92.0%, its 0.9% dropout rate is below the state's 1.1%, and ACT-based ELA (51.39%), math (45.83%), and science (48.61%) all exceed state averages. But 2025–2026 social studies proficiency is 46.84% against the state's 48.25%, its rank slipped to the 60th percentile with 3 stars, and chronic absenteeism (20.3%) is the highest in the group and above the state's 17.3%. Notably, absenteeism runs highest where performance trends are weakest, while spending and class size show no simple link to outcomes.