The Common Data Set, explained
Most colleges quietly publish a standardized data file every year that tells you exactly what they weigh in admissions. Here is what it is, how to read the part that matters most, and how to find it for any school.
1. What the Common Data Set is
The Common Data Set (CDS) is a standardized survey that most U.S. colleges and universities complete and publish each year. It uses a shared set of questions and definitions developed collaboratively by the publishing community and higher-education data providers, so that one school's numbers line up with another's.
It covers admissions, enrollment, academic offerings, financial aid, faculty, and more. Crucially for applicants, it is a free, primary source: the figures come straight from the institution itself, not from a ranking, a paid database, or a third party's interpretation. When you read a school's CDS, you are reading what that school reported about its own incoming class.
2. The sections that matter for applicants
The CDS is organized into lettered sections. For someone deciding where to apply and how to position an application, Section C (First-Time, First-Year Admission) is the one to focus on. It typically includes:
- Admit rate — applications received, admitted, and enrolled, which together tell you how selective the school actually is.
- Test-score ranges — the distribution of SAT and ACT scores for enrolled students, usually reported as percentiles.
- GPA distribution — how the entering class breaks down by high-school grade-point average.
- C7, "Relative importance of academic and nonacademic factors" — a table where the school rates how much each part of the application counts.
That last item, C7, is the most revealing single piece of the entire document, and it deserves its own explanation.
3. How to read C7
C7 lists the factors a college considers in admission and assigns each one a rating on a four-level scale:
- Very Important
- Important
- Considered
- Not Considered
The factors typically include rigor of secondary-school record, class rank, academic GPA, standardized test scores, the application essay, recommendations, extracurricular activities, talent or ability, character or personal qualities, first-generation status, alumni relation, geographical residence, state residency, religious affiliation, volunteer work, work experience, the level of an applicant's interest (often called demonstrated interest), and more.
Reading C7 tells you, in the school's own words, what it actually rewards. A school that rates rigor of secondary-school record as Very Important is telling you the transcript and course difficulty come first. A school that rates the essay or recommendations as Very Important is signaling that the written application carries real weight. And a school that rates level of applicant's interest as Considered or higher is telling you that demonstrated interest — visits, opened emails, engagement — can matter, while one that rates it Not Considered is telling you the opposite. Comparing the same factor across two schools often explains why an identical applicant lands differently at each.
4. Where to find a school's CDS
The simplest reliable way to find a school's Common Data Set is to search the school's name plus the phrase "common data set" (for example, University of Michigan common data set). Most institutions host the file on an institutional-research or office-of-the-registrar page, usually as a PDF, with one document per academic year.
One thing to keep in mind: the CDS lags the admissions cycle it describes. A given year's figures are typically published roughly 6 to 12 months after that class was admitted, because the school has to finish enrolling and counting before it can report. So the most recent file you find usually reflects a class that was admitted the prior cycle. That lag is normal — just note the year on the document and read it as recent history, not a live snapshot.
5. How AcceptanceAtlas uses the CDS
We use the Common Data Set primarily for two things: the factors a school weighs (drawn from C7) and whether a school appears to value demonstrated interest. We cross-check CDS figures against federal data — the U.S. Department of Education's College Scorecard — so that the underlying numbers are consistent with an independent government source rather than resting on a single document.
Every CDS-derived fact we surface is dated to its CDS year, so you always know which class a figure describes and how old it is. We treat admit rates and score ranges as facts and label our admission-odds figures as estimates — directional guidance, not a guarantee of admission. For the full picture of which sources feed which parts of the product and how the estimates are built, see our methodology.
6. Limitations
The CDS is one of the best free resources an applicant has, but it is not perfect, and it is worth knowing where it falls short:
- Not every school publishes it. The CDS is voluntary, so some institutions do not release one, or do not post it publicly, which means coverage is uneven.
- Some schools have stopped publishing C7. Even among schools that release a CDS, a number have stopped reporting the C7 factors table, so the single most useful section is not always available.
- It describes the past. Because of the publication lag, the CDS reflects a class already admitted; policies and emphasis can shift between cycles.
- Definitions are standardized, but reporting choices vary. Schools can differ in how completely they fill out optional fields, so a missing number is not always a meaningful one.
None of this makes the CDS less worth reading. It just means it works best as one well-sourced input among several, which is exactly how we treat it.
Put it to work
Reading C7 for one school is illuminating. Reading it across an entire list — alongside admit rates, score ranges, and your own profile — is how you decide where to apply and what to emphasize. If you want to see that done for your schools, AcceptanceAtlas builds it for you. You can also explore a sample admissions map or learn how to assemble a balanced college list first.
Admit rates and score ranges are facts from the U.S. Department of Education College Scorecard and schools' own Common Data Sets. Admission odds are estimates — directional guidance, not a guarantee of admission.