California State University, San Marcos GPA requirements & acceptance rate
Average GPA, acceptance rate and SAT/ACT ranges for California State University, San Marcos, all from its own Common Data Set 2025-26, plus a quick estimate of your chances.
What are my chances at California State University, San Marcos?
Enter your unweighted GPA to see an estimate.
What GPA do you need to get into California State University, San Marcos?
California State University, San Marcos’s own Common Data Set (2025-26, item C12) reports an average high school GPA of 3.316 for its enrolled first-year students who submitted a GPA (99.67% of them submitted one). It is an average, not a cut-off: many enrolled students were below it. The CDS does not say whether the figure is weighted, so treat it as a guide rather than a target. Source: California State University, San Marcos Common Data Set 2025-26, item C12.
Plenty of enrolled students were below the 3.316 average, especially those with a strong upward trend, a demanding course load, or test scores near the top of the range. Use the estimator above to see where you stand.
California State University, San Marcos acceptance rate
California State University, San Marcos’s Common Data Set 2025-26 (item C1) reports 20,881 first-time, first-year applicants for fall 2025 and 19,864 admitted, an acceptance rate of 95%. That makes California State University, San Marcos accessible — open to most applicants who meet the basics. GPA is only one piece: California State University, San Marcos also weighs the rigor of your courses, essays, recommendations and activities, and test scores where it considers them.
California State University, San Marcos SAT and ACT scores
The middle 50% of California State University, San Marcos’s enrolled first-year students who submitted scores had SAT 860–1113 and ACT 18.5–24 (25th to 75th percentile, Common Data Set 2025-26, item C9). A score at or above the 75th percentile puts you in the top quarter of enrolled students who reported one.
| Test | 25th | 50th | 75th | Submitted |
|---|---|---|---|---|
| SAT composite | 860 | 1010 | 1113 | 2.3% |
| ACT composite | 18.5 | 21 | 24 | under 1% |
California State University, San Marcos admissions at a glance
| First-year applicants (fall 2025) | 20,881 |
| Admitted | 19,864 |
| Acceptance rate | 95% |
| Average high school GPA | 3.316 |
| Submitted a GPA | 99.67% |
| SAT composite, 25th–75th | 860–1113 |
| ACT composite, 25th–75th | 18.5–24 |
| Common Data Set year | 2025-26 |
Source: California State University, San Marcos Common Data Set 2025-26 · California State University, San Marcos’s Common Data Set page, items C1 (applicants and admits), C9 (SAT/ACT) and C12 (GPA), read October 2026. Every figure on this page comes from the college’s own Common Data Set; none is from a third-party website.
Estimate your odds
The estimator above starts from California State University, San Marcos’s acceptance rate and moves it up or down with your GPA and SAT. It is a rough guide, not a prediction: it does not see your essays, course rigor or major. To plan the grades you need, try the college GPA calculator and the target GPA planner.
How to strengthen your application
Beyond the GPA range, focus on what you can still move: take the most challenging courses your school offers, keep your grades trending upward, prepare for the SAT or ACT if California State University, San Marcos considers them, and write essays that show genuine fit.