Addison Elementary

Addison Elementary, a mid-tier elementary school in Hartford, Wisconsin, part of Slinger School District, hosts 441 students, covering grades pre-K through 5. By comparison, Wisconsin's public schools average about 323 students each, so Addison Elementary sits 37% larger than that benchmark.

Slinger School District comprises 5 schools with combined enrollment of 3,234 students; Addison Elementary is among them.

Demographically, Addison Elementary records that nearly all students (88%) are White; the rest is composed of 5% Hispanic, 4% multiracial. That mix tracks the wider county fairly closely.

On the resource side, On paper, Addison Elementary has 27 full-time-equivalent teachers, translating to a class-load average of around 16.6:1. Statewide, the average ratio sits near 14.7:1, putting Addison Elementary higher than the state norm the norm. Roughly 13% of students at Addison Elementary qualify for free or reduced-price lunch, which schools and policymakers use as a rough income-mix signal. By comparison, Washington County runs at roughly 23%, so the school's eligibility rate is somewhat below the surrounding baseline.

On a demographically-adjusted basis, Addison Elementary sits in the middle band of the BeatsExpectations distribution. Schools with this campus's student mix typically land near 69.8%; this one delivers 70.6%.

Around the school, census data for Washington County shows median household earnings sit near $96,359, roughly 35% of adults have completed at least a four-year degree, and the poverty rate sits near 4%. Across Washington County's 34 public schools (combined enrollment of about 17,746 students), Addison Elementary is one campus in the mix.

Slinger Elementary is the nearest neighboring public school, about 3.2 miles from this campus. Counting just inside five miles, 4 other public schools cluster around Addison Elementary. Among the 9 schools in that immediate cluster with test data (this one included), Addison Elementary ranks 6th on composite proficiency, behind the local average of 73.2%.

The campus sits in a countryside setting.

Over the past 7-year window. Over the past 7-year window, the student count declined 8%: 478 students in 2018 compared to 441 in 2025. Class-load math has pulled in: from 17.8:1 in 2018 to 16.6:1 in 2025.

On this page, posts here usually surface around classroom updates, athletics, and weather closures. The community welcomes input from current and former families.