The student population at California State University-San Marcos is 16,237 (14,977 undergraduate and 1,260 graduate students) . The number of students has increased by 3,444 (26.92%) over the past decade.
The average student population over the last 11 years is 15,312 where 16,237 students are attending the school for the academic year 2024-2025.
Total enrollment fluctuated between 2016 and 2025, with 7 year-over-year increases and 2 decreases. It peaked at 16,367 students in 2021 and was lowest at 12,793 in 2016. Overall, enrollment rose from 12,793 to 16,237 students, a net gain of 3,444 (26.9%).
The following table and chart illustrate the changes in student population by gender at California State University-San Marcos since 2015.
| Year | Total | Undergraduate | Graduate | ||||
|---|---|---|---|---|---|---|---|
| Total | Men | Women | Total | Men | Women | ||
| 2015-16 | 12,793 | 12,184 | 4,798 | 7,386 | 609 | 192 | 417 |
| 2016-17 | 13,144 351 | 12,567 383 | 4,934 136 | 7,633 247 | 577 -32 | 191 -1 | 386 -31 |
| 2017-18 | 15,755 2,611 | 14,615 2,048 | 5,465 531 | 9,150 1,517 | 1,140 563 | 329 138 | 811 425 |
| 2018-19 | 15,972 217 | 14,923 308 | 5,652 187 | 9,271 121 | 1,049 -91 | 306 -23 | 743 -68 |
| 2019-20 | 16,053 81 | 14,837 -86 | 5,796 144 | 9,041 -230 | 1,216 167 | 375 69 | 841 98 |
| 2020-21 | 16,367 314 | 15,040 203 | 5,823 27 | 9,217 176 | 1,327 111 | 399 24 | 928 87 |
| 2021-22 | 16,255 -112 | 14,963 -77 | 5,740 -83 | 9,223 6 | 1,292 -35 | 367 -32 | 925 -3 |
| 2022-23 | 15,109 -1,146 | 13,914 -1,049 | 5,620 -120 | 8,294 -929 | 1,195 -97 | 335 -32 | 860 -65 |
| 2023-24 | 15,431 322 | 14,246 332 | 5,929 309 | 8,317 23 | 1,185 -10 | 327 -8 | 858 -2 |
| 2024-25 | 16,237 806 | 14,977 731 | 6,352 423 | 8,625 308 | 1,260 75 | 369 42 | 891 33 |
| Average | 15,312 | 14,227 | 5,611 | 8,616 | 1,085 | 319 | 766 |
The average number of Undergraduate students over the last 11 years is 14,227 where 14,977 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 California State University-San Marcos since 2015.
| Year | Total | Full-time | Part-time | ||||
|---|---|---|---|---|---|---|---|
| Total | Men | Women | Total | Men | Women | ||
| 2015-16 | 12,184 | 10,185 | 3,903 | 6,282 | 1,999 | 895 | 1,104 |
| 2016-17 | 12,567 | 10,469 | 3,996 | 6,473 | 2,098 | 938 | 1,160 |
| 2017-18 | 14,615 | 11,634 | 4,367 | 7,267 | 2,981 | 1,098 | 1,883 |
| 2018-19 | 14,923 | 11,895 | 4,448 | 7,447 | 3,028 | 1,204 | 1,824 |
| 2019-20 | 14,837 | 12,155 | 4,617 | 7,538 | 2,682 | 1,179 | 1,503 |
| 2020-21 | 15,040 | 12,381 | 4,609 | 7,772 | 2,659 | 1,214 | 1,445 |
| 2021-22 | 14,963 | 12,123 | 4,555 | 7,568 | 2,840 | 1,185 | 1,655 |
| 2022-23 | 13,914 | 11,144 | 4,457 | 6,687 | 2,770 | 1,163 | 1,607 |
| 2023-24 | 14,246 | 11,848 | 4,831 | 7,017 | 2,398 | 1,098 | 1,300 |
| 2024-25 | 14,977 | 12,465 | 5,206 | 7,259 | 2,512 | 1,146 | 1,366 |
| Average | 14,227 | 14,227 | 4,499 | 7,131 | 14,227 | 1,112 | 1,485 |
The average number of Graduate students over the last 11 years is 1,085 where 1,260 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 California State University-San Marcos since 2015.
| Year | Total | Full-time | Part-time | ||||
|---|---|---|---|---|---|---|---|
| Total | Men | Women | Total | Men | Women | ||
| 2015-16 | 609 | 397 | 123 | 274 | 212 | 69 | 143 |
| 2016-17 | 577 | 380 | 133 | 247 | 197 | 58 | 139 |
| 2017-18 | 1,140 | 767 | 216 | 551 | 373 | 113 | 260 |
| 2018-19 | 1,049 | 761 | 219 | 542 | 288 | 87 | 201 |
| 2019-20 | 1,216 | 911 | 284 | 627 | 305 | 91 | 214 |
| 2020-21 | 1,327 | 979 | 281 | 698 | 348 | 118 | 230 |
| 2021-22 | 1,292 | 910 | 256 | 654 | 382 | 111 | 271 |
| 2022-23 | 1,195 | 831 | 236 | 595 | 364 | 99 | 265 |
| 2023-24 | 1,185 | 847 | 237 | 610 | 338 | 90 | 248 |
| 2024-25 | 1,260 | 948 | 291 | 657 | 312 | 78 | 234 |
| Average | 1,085 | 1,085 | 228 | 546 | 1,085 | 91 | 221 |
The percentage of white students is 24.89% and the percentage of black students is 4.00% at California State University-San Marcos. 9.10% of enrolled students is Asian. Hispanic students comprise 50.77% of the student body.
Over the past 10 years, the racial composition has shifted. The percentage of white students decreased from 30.77% to 24.89%. Asian enrollment declined from 10.01% to 9.10%. Black student enrollment increased from 3.31% to 4.00%. Hispanic student representation expanded from 41.37% to 50.77%.
The overall racial diversity, measured by the Census Bureau Diversity Index, is 0.6666 which indicates that moderately diverse. This decreased from 0.7200 a decade ago, suggesting that racial diversity has declined.
The following table and chart illustrate the student population trends by race/ethnicity at California State University-San Marcos 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 | 44 | 1,281 | 423 | 5,292 | 47 | 3,937 | 699 |
| 2016-17 | 44 | 1,291 | 424 | 5,422 | 41 | 3,853 | 683 |
| 2017-18 | 47 | 1,545 | 465 | 6,475 | 40 | 4,180 | 826 |
| 2018-19 | 50 | 1,513 | 467 | 7,026 | 34 | 4,211 | 811 |
| 2019-20 | 45 | 1,488 | 484 | 7,299 | 38 | 4,317 | 833 |
| 2020-21 | 33 | 1,533 | 528 | 7,714 | 44 | 4,457 | 843 |
| 2021-22 | 46 | 1,593 | 557 | 7,819 | 41 | 4,275 | 840 |
| 2022-23 | 36 | 1,477 | 528 | 7,581 | 44 | 3,881 | 834 |
| 2023-24 | 49 | 1,470 | 582 | 7,770 | 49 | 3,945 | 912 |
| 2024-25 | 47 | 1,477 | 650 | 8,244 | 49 | 4,042 | 999 |
| Average | 44 | 1,467 | 511 | 7,064 | 43 | 4,110 | 828 |
1,048 students are enrolled in online degree programs exclusively for the academic year 2024-2025, which is 6% of total students. The number of online students has increased 622.76% since 2015. The following table and chart illustrate the changes in the online student population by enrolled type at California State University-San Marcos from 2015 to 2025.
| Year | Total Enrollment | Online Completely | Enrolled in Some Online Courses | Not Enrolled in Online Courses |
|---|---|---|---|---|
| 2015-16 | 12,793 | 145 | 2,408 | 10,240 |
| 2016-17 | 13,144 | 81 | 2,743 | 10,320 |
| 2017-18 | 15,755 | 1,000 | 3,405 | 11,350 |
| 2018-19 | 15,972 | 490 | 4,076 | 11,406 |
| 2019-20 | 16,053 | 568 | 4,693 | 10,792 |
| 2020-21 | 16,367 | 16,183 | 170 | 14 |
| 2021-22 | 16,255 | 5,539 | 8,464 | 2,252 |
| 2022-23 | 15,109 | 1,077 | 5,971 | 8,061 |
| 2023-24 | 15,431 | 882 | 5,684 | 8,865 |
| 2024-25 | 16,237 | 1,048 | 6,351 | 8,838 |
| Average | 15,312 | 2,701 | 4,397 | 8,214 |
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