Compiled from official source data by PlainSchools.
18 public K-12 schools in Upper Marlboro from NCES Common Core of Data: enrollment, grade span, demographics, and Civil Rights Data Collection statistics for every active campus.
According to NCES CCD 2024-25, Upper Marlboro has more public-school enrollment than 86% of the 4,487 US cities in this directory. Upper Marlboro sits in the broad middle of the national city distribution rather than at a single obvious extreme. Its scale, average Resource Investment Index, and staffing position need to be read together: a middle placement on one measure does not cancel a stronger or weaker result on another. The percentile panel makes those dimensions explicit, and the school table shows where the city aggregate breaks into materially different campus profiles.
A full K–12 ladder sits inside the city boundary
Upper Marlboro's list includes 5 elementary, 2 middle, and 4 high-school campuses, plus 7 combined-grade records. The city average spans every major grade stage, so the ranked table is more informative when read within level than as one interchangeable queue.
Campus spread matters more than the city mean
The 25-point gap between Phyllis E. Williams Elementary and International High School @ Largo shows the range hidden by Upper Marlboro's average Resource Investment Index. The city figure is useful for national placement, but families ultimately choose among campuses with different grade spans, enrollment, district affiliations, and reported support fields. Start with schools serving the relevant grade level, then compare the index components rather than assuming the city average describes any one classroom.
City enrollment
Top 14%
School count
Top 17%
Resource Index average
56th percentile
Teacher staffing
45th percentile
Dr. Henry a. Wise Jr. High accounts for 17.7% of all Upper Marlboro public-school enrollment
That concentration means Upper Marlboro-wide averages can mask substantial variation outside the largest entity. Grade level: High. The share measures enrollment concentration only; it does not establish how districts allocate programs, capital, or staff. Enrollment-weighted aggregates give this entity more weight than any smaller peer, while an unweighted entity average treats every record equally.
Upper Marlboro school enrollment varies 8.2× across entities
Upper Marlboro school enrollment ranges from 281 students (lowest) to 2,291 students (highest), a spread of 2,010 students. That relatively narrow ratio reflects an unusually homogeneous school portfolio for a city this size. Per-school staffing and program breadth can differ sharply at opposite ends of that enrollment range, so the city average should not be treated as a typical campus.
Upper Marlboro operates one school district — a single-district system
Upper Marlboro's listed schools share one district boundary, budget authority, and reporting chain. That makes citywide and districtwide governance easier to compare, but it does not make individual campuses uniform: grade configuration, staffing, programs, and student need can still vary materially within the same school district.
Upper Marlboro student-teacher ratio is 15.8:1 — near the typical range (US average ~15.7) — citywide staffing is neither unusually lean nor unusually crowded by this measure
student-teacher ratio is the simplest comparative metric but it does not capture the full picture: the ratio counts FTE classroom teachers against total enrollment, push-in specialists, English-language aides, special-education co-teachers, and counselors are not included in most reporting Variation between sub-units within Upper Marlboro is typically wider than the Upper Marlboro-aggregate figure suggests.
2 of Upper Marlboro's 18 listed schools are charters
11% of the city's listed public-school campuses are reported as charter schools in NCES CCD. Charter status identifies a different governance arrangement; it does not establish admissions availability, academic quality, or the share of city students enrolled in those campuses. Open each school record to compare enrollment and staffing directly.
Most racially and ethnically mixed schools in Upper Marlboro
Ranked by the Simpson student-body diversity index (0-100) from NCES race and ethnicity data, where higher means a more evenly mixed student body. It measures mix, not quality.
What do families ask about schools in Upper Marlboro?
Which Upper Marlboro school has the highest Resource Investment Index? ▼
Phyllis E. Williams Elementary has the highest Resource Investment Index among the Upper Marlboro schools in this federal-data comparison at 55/100. The index summarizes reported staffing, counseling, gifted-program, and attendance inputs; it is not an academic rating.
How many schools are in Upper Marlboro, MD? ▼
Upper Marlboro has 18 public schools with a total enrollment of 12,950 students. 2 are charter schools. Average student-teacher ratio: 15.8:1.
Data from NCES Common Core of Data (CCD) 2024-25 and Civil Rights Data Collection (CRDC) 2021-22. The Resource Investment Index uses reported student-teacher ratio,
counselor access, gifted programs, and attendance; it is not an academic rating. Cities must include at least five schools to be listed. This public-data comparison is for informational purposes:
verify current enrollment, attendance boundaries, and programs with the school district before acting. See the guide to understanding NCES data.
