Schools in Zip Code 53070

ZIP code 53070 covers Oostburg, Wisconsin, and is served by three public schools in the Oostburg School District: Oostburg Elementary (grades PK–5, 479 students), Oostburg Middle (grades 6–8, 204 students), and Oostburg High (grades 9–12, 328 students), for a total enrollment of 1,011. The district is ranked 20th of 432 Wisconsin districts — the 95th percentile, with 5 stars — and all three schools share that rating.

Oostburg Middle is the standout: 13th of 643 middle schools in 2025–26 (98th percentile) and 9th of 628 the prior year, with average proficiency around 84% versus roughly 55% statewide. It also has the lowest student-teacher ratio (13.6) and only 2.4% chronic absenteeism. Oostburg High ranks 19th of 533 high schools (96th percentile), graduates 95.1% of students, and has a 0.0% dropout rate, though its proficiency dipped from an extraordinary 2024–25 to a still-strong 2025–26. Oostburg Elementary remains above the state on every listed test and has a remarkable 0.7% chronic absenteeism rate, but its rank has softened from 64th of 1,061 in 2023–24 to 130th of 1,039 in 2025–26, and its star rating slipped from 5 to 4.

Across the district, spending does not track neatly with results: the high school spends the most per student ($15,321) while the middle school spends $12,871 and posts the strongest outcomes. Free/reduced lunch rates are low and tightly clustered (16.67% to 18.6%). Because cohorts are small — the middle school has just 204 students — single-year swings should be read with caution.