Purdue University: Inside the Numbers

Purdue’s admit rate fell from 68.9 percent to 43.4 percent across five entering classes. That is the steepest five-year compression of any university examined in this series, and the usual reading of such a number is that the university became far harder to enter. For most of the people who apply, that reading is correct. For the students Purdue exists to serve, it is close to false.

In the three years Purdue reported admissions by residency, the Indiana resident admit rate ran 73.9 percent, then 74.3 percent, then 71.1 percent. Over the same span the out-of-state rate fell from 50.3 to 43.6 percent and the international rate fell from 29.8 to 22.5 percent. An Indiana student applying for Fall 2025 faced odds roughly two points worse than three years earlier. An international student faced odds that had fallen by more than seven points from a much lower base.

Purdue is a land-grant university with an explicit obligation to the state that funds it, and its published figures show that obligation operating as a floor. The compression in the headline rate is almost entirely a story about everyone else.

What changed in the middle of this record

This piece requires more disclosure than most, because the five filings are not measuring the same institution throughout and because two of them contain errors.

Purdue changed the scope of its Common Data Set beginning with the 2024-25 filing. The first three filings cover Purdue West Lafayette alone. The last two add Purdue in Indianapolis and Polytechnic Statewide. Application counts, admit counts, and enrollment therefore step up across that boundary for reasons that have nothing to do with demand. Section H is spliced differently again, covering West Lafayette and Polytechnic only in 2024-25 and adding Indianapolis in 2025-26. Every table below marks the break, and comparisons that cross it are identified as such.

The 2024-25 filing reports a total admitted figure of 30,272. That number is wrong. The gender rows on the same sheet sum to 39,272, the residency rows sum independently to 39,272, and 30,272 is a duplicate of the women-applied figure sitting a few rows above. Taking the filed cell at face value produces an admit rate of 38.4 percent rather than 49.9 percent. This report uses 39,272 and flags the substitution wherever it appears.

Two smaller irregularities are worth stating. The 2023-24 filing stores its degree-share percentages as whole numbers where every other year stores them as decimals, so those values require conversion before they can be compared. And the 2021-22 filing labels its retention cohort as the students who entered in Fall 2019, where the form calls for the Fall 2020 cohort. The figure is carried as filed.

Applications, admits, and yield

Source: Purdue University Common Data Set filings, sections C1 and B22. The 2021-22 through 2023-24 filings cover Purdue West Lafayette only; the 2024-25 and 2025-26 filings add Purdue in Indianapolis and Polytechnic Statewide. The 2024-25 admitted figure is shown as 39,272, the sum of both the gender and residency rows, rather than the 30,272 printed in the total cell, which is a transcription error. Admit rate = admits divided by applications. Yield = enrolled divided by admits.

Applications and admit rate, Purdue University, five Common Data Set filings

Applications rose in every year, from 59,173 to 87,220. Purdue’s own announcement of the Fall 2025 class described it as the fourteenth consecutive year of record applications, and the university put the figure at 86,953 against the 87,220 actionable applications counted on the Common Data Set. Part of the later growth reflects the added campuses. Most of it does not.

Students admitted and yield rate, Purdue University, five Common Data Set filings

The number of offers moved very little. Purdue extended between 35,995 and 40,759 offers in every year, and the highest count came in the first year rather than the last. Against applications that grew by 28,000, a flat offer count is the entire mechanism behind the falling admit rate.

Yield sits near 25 percent in four of five years and jumps to 29.2 percent for Fall 2024. That single spike produced an entering class of 11,467, well above target, and Purdue responded by cutting offers the following year. The university said as much publicly, describing a deliberately smaller Fall 2025 class after the previous summer’s unexpected yield. Enrollment fell to 9,656 even though the scope of the filing had not changed, which makes that decline a decision rather than an artifact.

Residency is the whole story

Source: Purdue University Common Data Set filings 2023-24, 2024-25, and 2025-26, section C1 residency table, reported by known physical address at time of application. The 2021-22 and 2022-23 filings did not collect this breakdown. Fall 2024 and Fall 2025 include all three campuses. Purdue’s own Fall 2025 announcement reported an out-of-state rate of 39 percent, which corresponds to out-of-state and international applicants combined rather than the out-of-state row alone.

Admit rate by residency category, Purdue University, Fall 2023 through Fall 2025

Indiana applications were flat across all three years, moving from 12,038 to 12,235 and back to 12,040. Out-of-state applications grew by 11,924 over the same period and international applications by 2,494. The entire increase in demand came from outside the state, and Purdue absorbed almost none of it. Out-of-state offers stayed within 300 of each other in the last two years while the out-of-state pool grew by nearly 8,000.

International applicants took the sharpest cut. Offers fell from 4,246 to 3,672 while applications rose, and enrolled international first-year students dropped from 1,032 to 526, a decline of 49 percent in one year. Purdue attributed part of that to students delaying their start dates while waiting on visas.

Testing came back, and Purdue never really let it go

Source: Purdue University Common Data Set filings, sections C7 and C9. Submission percentages express submitters as a share of the enrolled first-year class; students submitting both tests appear in both rows. Factor ratings are read from the C7 grid in each filing.

Share of enrolled first-year students submitting each test, Purdue University

SAT submission climbed every year, from 62.2 percent of the enrolled class to 83.8 percent. ACT submission fell from 30.9 to 22.6 percent. Purdue rated standardized test scores very important in four consecutive filings, a rating no other factor except rigor of record and grade point average carried, and it now requires scores of all applicants.

The most recent filing contains the only change in Purdue’s stated weighting across the entire window, and it moves in two directions at once. Standardized test scores drop from very important to important. The application essay rises from important to very important. Every other factor holds its rating for five straight years, including class rank at considered, interviews and alumni relation at not considered, and first generation status at important.

The tuition freeze, and what the filings actually show

Source: Purdue University Common Data Set filings, section G1, West Lafayette figures. Filings do not report a consistent forward year: the 2022-23 and 2023-24 filings both report 2023-24 prices. The drop in required fees from $784 to $274 reflects a change in how Purdue categorises charges rather than a reduction in what students pay, and the housing and food series should be read with the same caution. The 2025-26 filing reports West Lafayette and Indianapolis on separate sheets.

Purdue held in-state tuition at $9,208 across three consecutive filings and out-of-state tuition at $28,010 alongside it. The published in-state figure has since moved to $9,718 and then $9,992, so the freeze that made Purdue a national reference point for public affordability has ended, though it ended gently. An increase of $784 on in-state tuition over five years is smaller in dollar terms than the single-year increase at most private universities in this series.

The other rows deserve more suspicion than the tuition row. Required fees fall by $510 at the same moment housing and food rise by $3,690, which is the signature of a reclassification rather than a real price movement. Readers should treat the total published cost across the scope break as unreliable and use the tuition line, which is unambiguous, as the affordability measure.

Aid, and the gap Purdue does not close

Source: Purdue University Common Data Set filings, sections H2 and H5. Aid figures cover full-time first-time first-year students. Section H scope differs from the admissions sections: the 2024-25 filing covers West Lafayette and Polytechnic Statewide only, with Indianapolis added in 2025-26.

Average need-based grant and share of demonstrated need met, Purdue University

Purdue does not meet full need and does not claim to. The share of demonstrated need met for first-year aid recipients ranged from 64.0 to 78.9 percent across the five filings and finished at 65.3 percent. Every private university examined in this series reported 100 percent in every year. That difference, roughly a third of demonstrated need left unmet, is the single largest structural distinction between Purdue and the private institutions it competes with for out-of-state students.

Share of graduating class borrowing and average cumulative amount borrowed, Purdue University

The counterweight is the price. Because in-state tuition sits under $10,000, an unmet-need gap at Purdue is arithmetically smaller than a fully met need at a university charging seven times as much. Borrowing has fallen from 38.8 percent of graduates to 34.0 percent while the average amount borrowed has stayed within a $1,300 band around $30,500 for five straight years.

Scale, and what it looks like in a classroom

Purdue is the largest institution examined in this series by a wide margin. Total undergraduate enrollment stood at 37,101 in the first filing and 43,633 in the last, though part of that increase reflects the added campuses rather than growth at West Lafayette. The first-year class alone runs between nine and eleven thousand students, which is larger than the entire undergraduate body at most of the private universities this series has covered.

Scale shows up in the section counts. Purdue offered 4,486 undergraduate class sections in Fall 2021 and 5,734 in Fall 2025. Sections enrolling fewer than 20 students accounted for 37.6 percent of the total in the first year and 39.7 percent in the last, so the small-section share improved slightly even as the university grew. Sections of 100 or more students rose from 368 to 438, and there are more of those at Purdue than there are class sections of any size at several schools in this series.

The student-to-faculty ratio held between 13.9 and 14.6 to one in all five filings. Read alongside the section distribution, that ratio describes a university where roughly two of every five sections are small and a meaningful minority are very large, which is the normal shape of a large public research institution and quite different from the private comparison group.

On the composition of the entering class, the 2021-22 filing recorded 6,392 White students, 1,386 Asian students, 852 international students, 671 Hispanic students, and 242 Black students among 10,191 first-year enrollees. Black students made up 2.4 percent of that class. Purdue’s first-year cohort is less racially diverse than any private institution in this series, and its international share of 8.4 percent is roughly half of Harvard’s.

What Purdue students study

Source: Purdue University Common Data Set filings, section J1, bachelor’s degree column, degrees conferred in the year preceding each filing. Percentages use majors rather than headcount. The 2023-24 filing stores these values as whole numbers rather than decimals and has been converted for comparability.

Combined share of bachelor’s degrees in engineering, engineering technologies, and computing

Engineering, engineering technologies, and computer science together accounted for 42.5 percent of Purdue bachelor’s degrees in the first filing and 47.6 percent in the last. Nearly half of everything Purdue confers sits in three related fields, and the share has risen in four of five years. Engineering alone reached 28.8 percent, its highest figure in the window.

Share of bachelor’s degrees conferred by discipline, 2021-22 filing against 2025-26 filing

The categories that lost ground are the ones a land-grant university was historically built on. Agriculture fell from 6.11 to 4.59 percent of degrees, health professions from 6.17 to 4.44 percent, and education from 2.47 to 1.74 percent. Business held steady near 12 percent throughout. Computer science gained nearly two full points, most of it in the final year.

Beyond the numbers

Purdue admits directly into the major, and this is the fact that separates it most sharply from the private universities in this series. An applicant to the College of Engineering enters through First-Year Engineering and selects a discipline afterward. An applicant to computer science is admitted to computer science. The Common Data Set publishes no admit rate by program, so the university-wide figure of 43.4 percent conceals a wide distribution underneath, and the most competitive programs at Purdue admit at rates far below it.

Internal transfer is the mechanism most applicants underestimate. Moving into computer science or into a capacity-constrained engineering discipline after enrolling requires meeting a published grade threshold in specific courses, and space is not guaranteed. An applicant who selects a less competitive program intending to switch later is taking a real risk, in a way that an applicant to a university admitting to a single undergraduate college is not.

Purdue runs non-binding early action with a November 1 deadline and no early decision plan of any kind. It reported the existence of that plan in all five filings and the application and admit counts in none of them, so the early advantage cannot be measured from this source.

Two forward-looking signals sit just outside this window. Purdue has said that early action applications for the Fall 2026 class came in slightly below the prior year, which would break a fourteen-year run of increases. And the university has been explicit that it is managing enrollment size deliberately rather than growing without limit, after the Fall 2024 class overshot its target by a wide margin.

The student-to-faculty ratio held between 13.9 and 14.6 to one across all five filings, moving less than any other measure in the file, including through the scope change.

What the five-year record means for applicants

Indiana residents should read the headline rate and then ignore it. The resident admit rate has sat between 71 and 74 percent in every year Purdue reported it, against a published figure of 43.4 percent. Roughly seven in ten Indiana applicants are admitted. A qualified in-state student treating Purdue as a reach is misreading the data by more than thirty percentage points.

Out-of-state and international applicants should read the opposite lesson. Their rates fell hardest and fastest, the international rate is now under 23 percent, and Purdue absorbed almost none of the application growth that came from outside Indiana. The university is not expanding to meet non-resident demand.

Choose the program deliberately, because Purdue admits to it. The application goes to a specific major, the competitive programs are much harder than the university-wide rate suggests, and the path from an easier program into a harder one runs through a grade threshold rather than a preference. Applicants should apply to the program they actually want and treat an alternate selection as a genuine second choice rather than a back door.

Send test scores and treat them seriously. Purdue requires them, rated them very important for four consecutive filings, and enrolled a class whose middle range is 1220 to 1470 on the SAT. The downgrade to important in the newest filing arrives alongside an upgrade for the essay, which suggests a marginal rebalancing rather than a retreat from testing.

On cost, run the numbers rather than the reputation. In-state tuition under $10,000 makes Purdue one of the least expensive research universities in the country for Indiana families, and the long freeze is real. But Purdue meets about two-thirds of demonstrated need, not all of it, and a third of its graduates leave with roughly $31,000 in debt. The affordability case rests on the low sticker price, not on the aid package.