Student Population at Caltech

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.

Explore California Institute of Technology

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
Women	971	446	525

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.

All Students

Race/Ethnicity Distribution (Total)
Race	Total	Men	Women
American Indian or Native American	2	2	0
Asian	550	288	262
Black	68	39	29
Hispanic	277	186	91
Native Hawaiian or Other Pacific Islanders	2	0	2
White	560	331	229
Two or more races	157	93	64
Race Unknown	4	3	1

Undergraduate

Race/Ethnicity Distribution (Undergraduate)
Race	Total	Men	Women
American Indian or Native American	1	1	0
Asian	354	177	177
Black	46	24	22
Hispanic	172	112	60
Native Hawaiian or Other Pacific Islanders	1	0	1
White	185	103	82
Two or more races	88	44	44
Race Unknown	1	0	1

Graduate

Race/Ethnicity Distribution (Graduate)
Race	Total	Men	Women
American Indian or Native American	1	1	0
Asian	196	111	85
Black	22	15	7
Hispanic	105	74	31
Native Hawaiian or Other Pacific Islanders	1	0	1
White	375	228	147
Two or more races	69	49	20
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.

All Students

Student Age Distribution (Total)
Age	Total	Men	Women
Under 18	20	12	8
18-19	425	196	229
20-21	471	222	249
22-24	585	202	383
25-29	780	290	490
30-34	130	45	85
35-39	17	3	14
40-49	2	1	1

Undergraduate

Student Age Distribution (Undergraduate)
Age	Total	Men	Women
Under 18	20	12	8
18-19	425	196	229
20-21	446	213	233
22-24	95	25	70
25-29	1	0	1

Graduate

Student Age Distribution (Graduate)
Age	Total	Men	Women
20-21	25	9	16
22-24	490	177	313
25-29	779	290	489
30-34	130	45	85
35-39	17	3	14
40-49	2	1	1

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

How many students attend Caltech?

For the academic year 2024-2025, 2,430 students are enrolled at Caltech.

How many undergraduate and graduate students are at Caltech?

987 undergraduate and 1,443 graduate students are enrolled at Caltech.

What is the gender breakdown at Caltech?

1,459 male (60.04%) and 971 female (39.96%) students are attending Caltech.

What is the international student enrollment at Caltech?

810 international students (33.33%) are enrolled at Caltech, including 139 undergraduate and 671 graduate students.

How diverse is the student population at Caltech?

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.

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