Summary:
ZIP code 55388 contains one elementary school, Watertown-Mayer Elementary School, which serves grades K–4 with 482 students in Watertown, Minnesota, as part of the Watertown-Mayer Public School District. Because it is the only elementary school in the ZIP code, there are no within-ZIP peer comparisons; the meaningful comparisons are the school versus its district, versus Minnesota state averages, and its own performance over time from 2023–2024 through 2025–2026.
The school has a 4-star rating in each of the last three reported years. In 2025–2026, it ranked 176th of 869 Minnesota schools (80th percentile, top 20%); in 2024–2025, it ranked 117th of 872 (87th percentile, top 13%); and in 2023–2024, it ranked 151st of 881 (83rd percentile). The district is even higher rated: 5 stars and ranked 44th of 458 in Minnesota (90th percentile). On 2025–2026 MCA tests, the school exceeded state averages in every reported math and reading measure. All-grade math proficiency was 66.5 versus the state’s 44.9 (+21.6), and all-grade reading was 60.1 versus 48.6 (+11.5). Math was consistently stronger than reading, by about 6–7 points in both 2024–2025 and 2025–2026. Reading was slightly below the district average (61.4) in 2025–2026 but still well above state. Grade-level figures for 3rd and 4th grade exactly matched district figures. Context: 30.29% free/reduced lunch and a 15.5 student-teacher ratio.
After a strong 2024–2025, the school saw a slight dip in 2025–2026: math fell 3.8 points, reading fell 3.27 points, and its rank slipped 59 places, though it remained 4 stars and in the top 20% of ranked schools. The broader district profile is exceptionally strong, but the elementary school itself still outperforms the state across all reported measures. For parents in ZIP 55388, this is the only public elementary option in the data, and it offers above-state proficiency, a 4-star rating, and a top-20% state rank in the most recent year.
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