The student population at Washington University in St Louis is 16,357 (8,220 undergraduate and 8,137 graduate students) . The number of students has increased by 1,669 (11.36%) over the past decade.
The average student population over the last 11 years is 15,937 where 16,357 students are attending the school for the academic year 2024-2025.
Total enrollment fluctuated between 2016 and 2025, with 6 year-over-year increases and 3 decreases. It peaked at 17,012 students in 2023 and was lowest at 14,688 in 2016. Overall, enrollment rose from 14,688 to 16,357 students, a net gain of 1,669 (11.4%).
The following table and chart illustrate the changes in student population by gender at Washington University in St Louis since 2015.
| Year | Total | Undergraduate | Graduate | ||||
|---|---|---|---|---|---|---|---|
| Total | Men | Women | Total | Men | Women | ||
| 2015-16 | 14,688 | 7,504 | 3,564 | 3,940 | 7,184 | 3,658 | 3,526 |
| 2016-17 | 15,047 359 | 7,555 51 | 3,525 -39 | 4,030 90 | 7,492 308 | 3,775 117 | 3,717 191 |
| 2017-18 | 15,303 256 | 7,675 120 | 3,542 17 | 4,133 103 | 7,628 136 | 3,734 -41 | 3,894 177 |
| 2018-19 | 15,852 549 | 7,751 76 | 3,611 69 | 4,140 7 | 8,101 473 | 3,831 97 | 4,270 376 |
| 2019-20 | 16,191 339 | 7,822 71 | 3,636 25 | 4,186 46 | 8,369 268 | 3,904 73 | 4,465 195 |
| 2020-21 | 15,449 -742 | 7,653 -169 | 3,563 -73 | 4,090 -96 | 7,796 -573 | 3,721 -183 | 4,075 -390 |
| 2021-22 | 16,973 1,524 | 8,034 381 | 3,724 161 | 4,310 220 | 8,939 1,143 | 4,252 531 | 4,687 612 |
| 2022-23 | 17,012 39 | 8,132 98 | 3,690 -34 | 4,442 132 | 8,880 -59 | 4,279 27 | 4,601 -86 |
| 2023-24 | 16,500 -512 | 8,267 135 | 3,742 52 | 4,525 83 | 8,233 -647 | 4,085 -194 | 4,148 -453 |
| 2024-25 | 16,357 -143 | 8,220 -47 | 3,674 -68 | 4,546 21 | 8,137 -96 | 4,086 1 | 4,051 -97 |
| Average | 15,937 | 7,861 | 3,627 | 4,234 | 8,076 | 3,933 | 4,143 |
The average number of Undergraduate students over the last 11 years is 7,861 where 8,220 students are attending the Undergraduate school for the academic year 2024-2025. The following table and chart illustrate the changes in Undergraduate enrollment by attending status and gender at Washington University in St Louis since 2015.
| Year | Total | Full-time | Part-time | ||||
|---|---|---|---|---|---|---|---|
| Total | Men | Women | Total | Men | Women | ||
| 2015-16 | 7,504 | 6,819 | 3,308 | 3,511 | 685 | 256 | 429 |
| 2016-17 | 7,555 | 6,915 | 3,298 | 3,617 | 640 | 227 | 413 |
| 2017-18 | 7,675 | 7,074 | 3,332 | 3,742 | 601 | 210 | 391 |
| 2018-19 | 7,751 | 7,146 | 3,394 | 3,752 | 605 | 217 | 388 |
| 2019-20 | 7,822 | 7,139 | 3,415 | 3,724 | 683 | 221 | 462 |
| 2020-21 | 7,653 | 7,077 | 3,370 | 3,707 | 576 | 193 | 383 |
| 2021-22 | 8,034 | 7,348 | 3,508 | 3,840 | 686 | 216 | 470 |
| 2022-23 | 8,132 | 7,445 | 3,504 | 3,941 | 687 | 186 | 501 |
| 2023-24 | 8,267 | 7,576 | 3,553 | 4,023 | 691 | 189 | 502 |
| 2024-25 | 8,220 | 7,534 | 3,508 | 4,026 | 686 | 166 | 520 |
| Average | 7,861 | 7,861 | 3,419 | 3,788 | 7,861 | 208 | 446 |
The average number of Graduate students over the last 11 years is 8,076 where 8,137 students are attending the Graduate school for the academic year 2024-2025. The following table and chart illustrate the changes in Graduate enrollment by attending status and gender at Washington University in St Louis since 2015.
| Year | Total | Full-time | Part-time | ||||
|---|---|---|---|---|---|---|---|
| Total | Men | Women | Total | Men | Women | ||
| 2015-16 | 7,184 | 5,845 | 2,967 | 2,878 | 1,339 | 691 | 648 |
| 2016-17 | 7,492 | 6,044 | 2,998 | 3,046 | 1,448 | 777 | 671 |
| 2017-18 | 7,628 | 6,174 | 3,010 | 3,164 | 1,454 | 724 | 730 |
| 2018-19 | 8,101 | 6,627 | 3,164 | 3,463 | 1,474 | 667 | 807 |
| 2019-20 | 8,369 | 6,735 | 3,156 | 3,579 | 1,634 | 748 | 886 |
| 2020-21 | 7,796 | 6,127 | 2,925 | 3,202 | 1,669 | 796 | 873 |
| 2021-22 | 8,939 | 7,477 | 3,600 | 3,877 | 1,462 | 652 | 810 |
| 2022-23 | 8,880 | 7,184 | 3,456 | 3,728 | 1,696 | 823 | 873 |
| 2023-24 | 8,233 | 6,706 | 3,315 | 3,391 | 1,527 | 770 | 757 |
| 2024-25 | 8,137 | 6,748 | 3,368 | 3,380 | 1,389 | 718 | 671 |
| Average | 8,076 | 8,076 | 3,196 | 3,371 | 8,076 | 737 | 773 |
The percentage of white students is 34.95% and the percentage of black students is 7.10% at Washington University in St Louis. 14.02% of enrolled students is Asian. Hispanic students comprise 8.97% of the student body.
Over the past 10 years, the racial composition has shifted. The percentage of white students decreased from 50.14% to 34.95%. Asian enrollment grew from 13.20% to 14.02%. Black student enrollment increased from 5.81% to 7.10%. Hispanic student representation expanded from 5.02% to 8.97%.
The overall racial diversity, measured by the Census Bureau Diversity Index, is 0.8430 which indicates that highly diverse. This increased from 0.7245 a decade ago, suggesting that racial diversity has improved.
The following table and chart illustrate the student population trends by race/ethnicity at Washington University in St Louis over the past 11 years (2015-2025).
| Year | American Indian or Native American | Asian | Black | Hispanic | Native Hawaiian or Other Pacific Islander | White | Two or More Races |
|---|---|---|---|---|---|---|---|
| 2015-16 | 47 | 1,939 | 853 | 738 | 4 | 7,364 | 413 |
| 2016-17 | 45 | 1,932 | 953 | 856 | 5 | 7,332 | 453 |
| 2017-18 | 41 | 1,865 | 1,078 | 975 | 6 | 7,266 | 482 |
| 2018-19 | 37 | 1,841 | 1,217 | 1,038 | 9 | 7,205 | 519 |
| 2019-20 | 39 | 1,839 | 1,242 | 1,083 | 11 | 6,958 | 608 |
| 2020-21 | 35 | 1,998 | 1,173 | 1,161 | 14 | 6,766 | 617 |
| 2021-22 | 36 | 2,141 | 1,201 | 1,273 | 18 | 6,777 | 700 |
| 2022-23 | 32 | 2,270 | 1,169 | 1,345 | 14 | 6,382 | 766 |
| 2023-24 | 22 | 2,293 | 1,186 | 1,412 | 8 | 5,930 | 804 |
| 2024-25 | 20 | 2,293 | 1,162 | 1,468 | 7 | 5,717 | 752 |
| Average | 35 | 2,041 | 1,123 | 1,135 | 10 | 6,770 | 611 |
678 students are enrolled in online degree programs exclusively for the academic year 2024-2025, which is 4% of total students. The number of online students has increased 198.68% since 2015. The following table and chart illustrate the changes in the online student population by enrolled type at Washington University in St Louis from 2015 to 2025.
| Year | Total Enrollment | Online Completely | Enrolled in Some Online Courses | Not Enrolled in Online Courses |
|---|---|---|---|---|
| 2015-16 | 14,688 | 227 | 149 | 14,312 |
| 2016-17 | 15,047 | 264 | 160 | 14,623 |
| 2017-18 | 15,303 | 359 | 168 | 14,776 |
| 2018-19 | 15,852 | 434 | 204 | 15,214 |
| 2019-20 | 16,191 | 503 | 434 | 15,254 |
| 2020-21 | 15,449 | 2,401 | 10,702 | 2,346 |
| 2021-22 | 16,973 | 775 | 2,544 | 13,654 |
| 2022-23 | 17,012 | 780 | 1,277 | 14,955 |
| 2023-24 | 16,500 | 649 | 717 | 15,134 |
| 2024-25 | 16,357 | 678 | 713 | 14,966 |
| Average | 15,937 | 707 | 1,707 | 13,523 |
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