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California Polytechnic State University-San Luis Obispo and San Diego State University are both public institutions — California Polytechnic State University-San Luis Obispo in San Luis Obispo, CA and San Diego State University in San Diego, CA. This page compares published admission, cost, and outcome data from federal sources so you can see the tradeoffs before you add either school to your list.
San Luis Obispo, CA · Public
Acceptance rate: 31.3%
Undergrad enrollment: 21,996
Tuition: $34,665/year
Student-faculty ratio: 19.0:1
Graduation rate: 86.4%
Top programs: Engineering, Business and marketing, Agriculture
Best for: Students who want a public campus in San Luis Obispo, CA with published program strength in Engineering and Business and marketing.
San Diego, CA · Public
Acceptance rate: 36.2%
Undergrad enrollment: 35,377
Tuition: $21,328/year
Student-faculty ratio: 27.0:1
Graduation rate: 76.4%
Top programs: Business and marketing, Psychology, Social sciences
Best for: Students who want a public campus in San Diego, CA with published program strength in Business and marketing and Psychology.
| Factor | California Polytechnic State University-San Luis Obispo | San Diego State University |
|---|---|---|
| Acceptance rate | 31.3% | 36.2% |
| SAT range (middle 50%) | Not reported | Not reported |
| ACT range (middle 50%) | Not reported | Not reported |
| Undergraduate enrollment | 21,996 | 35,377 |
| Out-of-state tuition | $34,665/year | $21,328/year |
| Average net price after aid | $16,665 | $15,364 |
| Graduation rate | 86.4% | 76.4% |
| Median earnings (10 years) | $90,768 | $64,909 |
| Student-faculty ratio | 19.0:1 | 27.0:1 |
| Institution type | Public | Public |
| Location | San Luis Obispo, CA | San Diego, CA |
| Largest program areas | Engineering, Business and marketing, Agriculture | Business and marketing, Psychology, Social sciences |
California Polytechnic State University-San Luis Obispo is more selective (31.3% vs 36.2% acceptance rate). San Diego State University has a lower average net price after grant aid ($15,364 vs $16,665). California Polytechnic State University-San Luis Obispo reports the higher graduation rate (86.4% vs 76.4%). San Diego State University is the larger undergraduate campus (35,377 students). Use the free side-by-side comparison tool to weigh cost, program fit, location, and outcomes for your own list — and verify deadlines and requirements with each college.
California Polytechnic State University-San Luis Obispo vs University of California-Santa Barbara
31.3% vs 33.0% acceptance rate
California Polytechnic State University-San Luis Obispo vs University of California-Irvine
31.3% vs 28.6% acceptance rate
California Polytechnic State University-San Luis Obispo vs University of California-San Diego
31.3% vs 26.7% acceptance rate
California Polytechnic State University-San Luis Obispo vs University of California-Davis
31.3% vs 41.8% acceptance rate
Common questions when choosing between California Polytechnic State University-San Luis Obispo and San Diego State University
California Polytechnic State University-San Luis Obispo has an acceptance rate of 31.3%; San Diego State University is around 36.2%. Selectivity is only one factor — GPA, essays, major, and residency (for publics) all change the odds.
California Polytechnic State University-San Luis Obispo tuition is $34,665/year. San Diego State University is $21,328/year. Compare net price after aid, not sticker price — especially for private schools and out-of-state publics.
Use College Decider's free comparison tool at /compare — add both schools to see tuition, acceptance rates, graduation outcomes, and more in one table.
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