Frederick W. Hartnett Middle School

Frederick W. Hartnett Middle School, a mid-sized middle-grades school in Blackstone, Massachusetts, one of the schools within Blackstone-Millville, enrolls 487 students, covering grades 4 through 7.

Blackstone-Millville runs 3 schools in total, collectively educating 1,480 students. Frederick W. Hartnett Middle School is one of those campuses.

On the student-mix side, Frederick W. Hartnett Middle School logs that the largest single group is White, at 79% of enrollment; the rest is composed of 14% Hispanic, 4% multiracial, 2% Black.

On the resource side, Staff filings list 32 full-time-equivalent teachers, which works out to roughly 15.0:1 students per teacher. The state averages around 11.5:1, so this campus is higher than the state norm typical.

In the broader community, the surrounding county (Worcester County) logs that median household income runs about $95,939, roughly 40% of adults have completed at least a four-year degree, and roughly 7% of residents live below the federal poverty line. In all, Worcester County runs 257 public schools (combined enrollment of about 121,490 students), of which Frederick W. Hartnett Middle School is one.

The closest other public school is Blackstone Millville RHS, roughly 0.7 miles away. Within five miles, there are 8 other public schools.

The campus sits in a commuter-belt setting.

Trend over the last 7 years. Over the past 7-year window, the student count ticked up 14%: 426 students in 2018 compared to 487 in 2025. White enrollment moved from 90% to 79% across the same window. Class-load math has loosened: from 12.9:1 in 2018 to 15.0:1 in 2025.

On this page, posts here usually surface around classroom updates, athletics, and weather closures. Members of the school community can share what they know.