Mary Williams Elementary

Mary Williams Elementary, a medium-sized primary school in Dumfries, Virginia, part of Prince William County Public Schools, enrolls 669 students, covering grades pre-K through 5. Enrollment runs roughly 34% larger than the state mean of about 499.

Across the 95 schools in Prince William County Public Schools (90,242 students total), Mary Williams Elementary accounts for its share of the district's footprint.

In terms of who attends, Mary Williams Elementary shows that the largest single group is Black at 34%, but no single group is in the majority. The remainder is composed of 28% Hispanic, 17% Asian, 15% White, 5% multiracial. The wider county runs roughly 20% Black, putting the school's mix noticeably more Black than the area baseline.

Looking at the economic backdrop, Staff filings list 42 full-time-equivalent teachers, which works out to roughly 15.9:1 students per teacher. That figure is higher than the state norm's 13.8:1 average. About 71% of enrolled students meet the income threshold for free or reduced-price lunch, which schools and policymakers use as a rough income-mix signal. By comparison, Prince William County runs at roughly 55%, so the school's eligibility rate is higher than the surrounding baseline.

Adjusting for the school's free-and-reduced-lunch share, Mary Williams Elementary sits in the middle band of the BeatsExpectations distribution. Schools with this campus's student mix typically land near 68.8%; this one delivers 70.3%.

In the area at large, the surrounding county (Prince William County) shows that median household income runs about $131,402, about 45% of the adult population holds a bachelor's degree or above, and census figures put the poverty rate at about 5%. Mary Williams Elementary is one of 102 public schools in Prince William County (combined enrollment of about 89,591 students).

Potomac Middle is the nearest neighboring public school, about 0.2 miles from this campus. Within five miles, there are 8 other public schools. Among the 9 schools in that immediate cluster with test data (this one included), Mary Williams Elementary ranks 5th on composite proficiency, above the local average of 67.2%.

The campus sits in a bedroom-community setting.

Trend over the last 7 years. Mary Williams Elementary's enrollment has contracted 11% since 2018, when it stood at 751 (now 669). Black enrollment moved from 40% to 34% across the same window.

On the community side, posts here usually surface around pickup logistics, teacher feedback, and after-school programs. Members of the school community can share what they know.