How many students at Caltech?
For the academic year 2024-2025, California Institute of Technology has a total enrollment of 2,430 students, including 987 undergraduate and 1,443 graduate students.
- Gender Breakdown: 1,459 male students (60%) and 971 female students (40%) are attending .
- Race and Ethnicity Breakdown: The two largest race/ethnicity groups are 560 White students (23%) and 550 Asian students (22.6%).
- Class Level Breakdown: 987 undergraduate students (40.6%) and 1,443 graduate students (59.4%).
Compared to similar private (not-for-profit) Research University (very high research activity) - which average 19,644 - Caltech's body is much smaller.
Explore complete student demographics below, including gender ratio, race and ethnicity, and age distribution.
Enrollment by Gender and Class Level
By gender, 1,459 male (60.04%) and 971 female (39.96%) students are attending California Institute of Technology. The number of male students per 100 females students (male-to-female ratio) is 150.26.
By class level, 987 (40.62%) are undergraduate students and 1,443 (59.38%) are graduate students. Among undergraduates, 54.81% are male and 45.19% are female, while among graduate students, 63.62% are male and 36.38% are female.
Total Student Enrolled By Gender
| Total | Undergraduate | Graduate |
|---|
| Total | 2,430 | 987 | 1,443 |
|---|
| Men | 1,459 | 541 | 918 |
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| Women | 971 | 446 | 525 |
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Student Distribution by Race/Ethnicity
By race/ethnicity, 560 White, 68 Black, and 550 Asian students out of a total of 2,430 are attending at California Institute of Technology. Comprehensive enrollment statistic data by race/ethnicity is shown in the chart below (academic year 2024-2025 data).
California Institute of Technology is highly diverse with a diversity index of 87.8% measured by Census Bureau Diversity Index. The institution demonstrates strong racial and ethnic diversity among its student body.
Race/Ethnicity Distribution (Total)
| Race | Total | Men | Women |
| American Indian or Native American | 2 | 2 | 0 |
|---|
| Asian | 550 | 288 | 262 |
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| Black | 68 | 39 | 29 |
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| Hispanic | 277 | 186 | 91 |
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| Native Hawaiian or Other Pacific Islanders | 2 | 0 | 2 |
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| White | 560 | 331 | 229 |
|---|
| Two or more races | 157 | 93 | 64 |
|---|
| Race Unknown | 4 | 3 | 1 |
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Race/Ethnicity Distribution (Undergraduate)
| Race | Total | Men | Women |
| American Indian or Native American | 1 | 1 | 0 |
|---|
| Asian | 354 | 177 | 177 |
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| Black | 46 | 24 | 22 |
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| Hispanic | 172 | 112 | 60 |
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| Native Hawaiian or Other Pacific Islanders | 1 | 0 | 1 |
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| White | 185 | 103 | 82 |
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| Two or more races | 88 | 44 | 44 |
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| Race Unknown | 1 | 0 | 1 |
|---|
Race/Ethnicity Distribution (Graduate)
| Race | Total | Men | Women |
| American Indian or Native American | 1 | 1 | 0 |
|---|
| Asian | 196 | 111 | 85 |
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| Black | 22 | 15 | 7 |
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| Hispanic | 105 | 74 | 31 |
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| Native Hawaiian or Other Pacific Islanders | 1 | 0 | 1 |
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| White | 375 | 228 | 147 |
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| Two or more races | 69 | 49 | 20 |
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| Race Unknown | 3 | 3 | 0 |
|---|
Student Age Distribution
There are 1,501 students under 25 years old, and 929 students over 25 years old out of 2,430 total students.
Caltech has 986 undergraduate students aged under 25 and 1 students aged 25 and over.
It has 515 graduate students aged under 25 and 928 students aged 25 and over.
Student Age Distribution (Total)
| Age | Total | Men | Women |
| Under 18 | 20 | 12 | 8 |
|---|
| 18-19 | 425 | 196 | 229 |
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| 20-21 | 471 | 222 | 249 |
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| 22-24 | 585 | 202 | 383 |
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| 25-29 | 780 | 290 | 490 |
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| 30-34 | 130 | 45 | 85 |
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| 35-39 | 17 | 3 | 14 |
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| 40-49 | 2 | 1 | 1 |
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Student Age Distribution (Undergraduate)
| Age | Total | Men | Women |
| Under 18 | 20 | 12 | 8 |
|---|
| 18-19 | 425 | 196 | 229 |
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| 20-21 | 446 | 213 | 233 |
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| 22-24 | 95 | 25 | 70 |
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| 25-29 | 1 | 0 | 1 |
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Student Age Distribution (Graduate)
| Age | Total | Men | Women |
| 20-21 | 25 | 9 | 16 |
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| 22-24 | 490 | 177 | 313 |
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| 25-29 | 779 | 290 | 489 |
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| 30-34 | 130 | 45 | 85 |
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| 35-39 | 17 | 3 | 14 |
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| 40-49 | 2 | 1 | 1 |
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Transfer-in Students (Undergraduate)
Among 987 enrolled in undergraduate programs, 10 students have transferred-in from other institutions. The percentage of transfer-in students is 1.01%.
Transfer-in Students (Undergraduate)
| Number of Students |
|---|
| Regular Full-time | 977 |
|---|
| Transfer-in Full-time | 10 |
|---|
Caltech Enrollment Frequently Asked Questions
For the academic year 2024-2025, 2,430 students are enrolled at Caltech.
987 undergraduate and 1,443 graduate students are enrolled at Caltech.
1,459 male (60.04%) and 971 female (39.96%) students are attending Caltech.
810 international students (33.33%) are enrolled at Caltech, including 139 undergraduate and 671 graduate students.
Caltech has a student population that is notably includes a large Asian student body: 560 White (23.05%), 68 Black (2.80%), and 550 Asian (22.63%) students are enrolled.