Stone Mill Elementary

Stone Mill Elementary is a middle-of-the-pack primary school in North Potomac, Maryland, overseen by Montgomery County Public Schools. The school serves 516 students in grades pre-K through 5.

Montgomery County Public Schools comprises 208 schools with combined enrollment of 159,181 students; Stone Mill Elementary is among them.

Looking at the student body, Stone Mill Elementary shows that the most-represented group is Asian (46%), with the rest of the student body spread across multiple groups; the rest looks like 22% White, 12% Hispanic, 11% Black, 8% multiracial. That is meaningfully more Asian than the county at large, where the share is closer to 15%.

On the income-and-resources front, The school employs 35 full-time-equivalent teachers, for a student-teacher ratio near 14.5:1. The state averages around 13.8:1, so this campus is higher than the state norm typical. About 14% of enrolled students meet the income threshold for free or reduced-price lunch, which schools and policymakers use as a rough income-mix signal. Set against Montgomery County (around 40%), the school's rate is meaningfully below typical.

Adjusting for the school's free-and-reduced-lunch share, Stone Mill Elementary performs roughly as the BeatsExpectations model predicts for a school with this FRL share. The predicted value is around 65.8%, the actual is 77.3%, a residual of +11.4 points.

In the area at large, ACS estimates for Montgomery County put the typical household earns roughly $132,450 per year, roughly 61% of adults have completed at least a four-year degree, and roughly 5% of residents live below the federal poverty line. Stone Mill Elementary is one of 211 public schools in Montgomery County (combined enrollment of about 159,181 students).

John L Gildner Regional Inst for Children & Adol is the nearest neighboring public school, about 1.0 miles from this campus. Within five miles, there are 8 other public schools. Among the 8 schools in that immediate cluster with test data (this one included), Stone Mill Elementary ranks 3rd on composite proficiency, above the local average of 64.0%.

Stone Mill Elementary operates from a commuter-belt location.

Trend over the last 7 years. Over the past 7-year window, the student count declined 14%: 601 students in 2018 compared to 516 in 2025. Hispanic enrollment moved from 6% to 12% across the same window. The student-to-teacher ratio fell from 16.2:1 in 2018 to 14.5:1 today.

On allk12, recent activity here tends to focus on school events, parent volunteer needs, and clubs. Parents, students, alumni, and staff are welcome to weigh in.