Old Mill Middle South

Old Mill Middle South, a big 6-8 campus in Millersville, Maryland, overseen by Anne Arundel County Public Schools, caters to 1,173 students, covering grades 6 through 8. By comparison, Maryland's public schools average about 764 students each, so Old Mill Middle South sits 54% above that benchmark.

Within Anne Arundel County Public Schools, which oversees 125 schools and 85,029 students, Old Mill Middle South is one campus in the system.

On demographics, Old Mill Middle South logs that the most-represented group is Black (39%), with the rest of the student body spread across multiple groups. Beyond that, the school logs 28% White, 20% Hispanic, 8% multiracial, 5% Asian. That is noticeably more Black than the county at large, where the share is closer to 18%.

Looking at the economic backdrop, On paper, Old Mill Middle South has 78 full-time-equivalent teachers, translating to a class-load average of around 15.0:1. That figure is higher than the state norm's 14.3:1 average. Roughly 57% of students at Old Mill Middle South qualify for free or reduced-price lunch, a commonly cited indicator of low-income enrollment. Set against Anne Arundel County (around 42%), the school's rate is somewhat above typical.

After controlling for student poverty, Old Mill Middle South performs roughly as the BeatsExpectations model predicts for a school with this FRL share. The predicted value is around 40.2%, the actual is 37.5%, a residual of -2.7 points.

Across the wider county, census data for Anne Arundel County shows the typical household earns roughly $124,911 per year, roughly 46% of adults have completed at least a four-year degree, and the poverty rate sits near 4%. In all, Anne Arundel County runs 129 public schools (combined enrollment of about 85,074 students), of which Old Mill Middle South is one.

Nearest neighbor: Southgate Elementary, around 0.5 miles off. Within five miles, there are 8 other public schools. Among the 7 schools in that immediate cluster with test data (this one included), Old Mill Middle South ranks 2nd on composite proficiency, beneath the local average of 40.5%.

Geographically, the school is in a residential area.

Over the past 7-year window. Over the past 7-year window, the student count expanded 35%: 870 students in 2018 compared to 1,173 in 2025. The White share of enrollment declined from 57% to 28% over that span. The student-to-teacher ratio grew from 13.5:1 in 2018 to 15.0:1 today.

On this page, the feed for Old Mill Middle South typically covers classroom updates, athletics, and weather closures. Members of the school community can share what they know.