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The most popular University of California, Irvine undergraduate major is Computer Science. Biology/Biological Sciences, General and Business/Managerial Economics are other popular majors.
| Computer Science | 729 |
| Biology/Biological Sciences, General | 668 |
| Business/Managerial Economics | 647 |
| Public Health, Other | 473 |
| Research and Experimental Psychology, Other | 435 |
| Psychology, General | 371 |
| Economics, General | 346 |
| Business Administration and Management, General | 340 |
| Criminology | 322 |
| Mathematics, General | 309 |
| Mechanical Engineering | 260 |
| Education, General | 251 |
| Political Science and Government, General | 211 |
| Sociology | 205 |
| Computer Engineering, General | 177 |
| Film/Cinema/Video Studies | 168 |
| Bioengineering and Biomedical Engineering | 156 |
| English Language and Literature, General | 138 |
| International/Global Studies | 132 |
| Civil Engineering, General | 123 |
| Social Psychology | 119 |
| Informatics | 113 |
| Chemistry, General | 111 |
| Human Biology | 106 |
| Pharmaceutical Sciences | 102 |
| Econometrics and Quantitative Economics | 99 |
| Chemical Engineering | 82 |
| Aerospace, Aeronautical and Astronautical/Space Engineering | 78 |
| Electrical and Electronics Engineering | 78 |
| Art/Art Studies, General | 77 |
| Criminology | 76 |
| Drama and Dramatics/Theatre Arts, General | 76 |
| Urban Studies/Affairs | 68 |
| Computer Software Engineering | 65 |
| History, General | 62 |
| Modeling, Virtual Environments and Simulation | 62 |
| Neurobiology and Anatomy | 60 |
| Physics, General | 53 |
| Information Resources Management | 52 |
| Anthropology | 51 |
| Environmental Studies | 50 |
| Nursing Science | 49 |
| Dance, General | 46 |
| Sociology | 46 |
| Mathematics and Computer Science | 41 |
| Multi-/Interdisciplinary Studies, Other | 41 |
| Geology/Earth Science, General | 37 |
| Materials Engineering | 35 |
| Philosophy | 33 |
| Physics, Other | 33 |
| Biochemistry and Molecular Biology | 31 |
| Social Psychology | 29 |
| Microbiology and Immunology | 24 |
| Political Science and Government, General | 24 |
| Environmental/Environmental Health Engineering | 23 |
| Journalism, Other | 23 |
| Cognitive Psychology and Psycholinguistics | 22 |
| Social Sciences, General | 20 |
| Psychology, General | 19 |
| Aerospace, Aeronautical and Astronautical/Space Engineering | 18 |
| Exercise Physiology | 17 |
| International/Global Studies | 17 |
| East Asian Studies | 16 |
| Hispanic-American, Puerto Rican, and Mexican-American/Chicano Studies | 16 |
| Cognitive Science | 15 |
| Computer Science | 15 |
| Multi-/Interdisciplinary Studies, Other | 15 |
| Art History, Criticism and Conservation | 13 |
| Urban Studies/Affairs | 13 |
| Biology Teacher Education | 12 |
| Spanish Language and Literature | 12 |
| Ethnic, Cultural Minority, Gender, and Group Studies, Other | 10 |
| Music Performance, General | 10 |
| Music, General | 9 |
| Musical Theatre | 9 |
| Chinese Studies | 8 |
| Ecology, Evolution, Systematics and Population Biology, Other | 8 |
| Film/Cinema/Video Studies | 7 |
| Classics and Classical Languages, Literatures, and Linguistics, General | 6 |
| Genetics, General | 6 |
| Spanish Language and Literature | 6 |
| Asian-American Studies | 5 |
| Dance, General | 5 |
| African-American/Black Studies | 4 |
| Comparative Literature | 4 |
| Environmental/Environmental Health Engineering | 4 |
| Japanese Language and Literature | 4 |
| Korean Language and Literature | 4 |
| Cell/Cellular Biology and Histology | 3 |
| Computer Engineering, General | 3 |
| Geology/Earth Science, General | 3 |
| History, General | 3 |
| Journalism, Other | 3 |
| Mathematics, General | 3 |
| Physics, General | 3 |
| East Asian Studies | 2 |
| German Studies | 2 |
| Materials Engineering | 2 |
| Mathematics and Computer Science | 2 |
| Business/Managerial Economics | 1 |
| Chemistry, General | 1 |
| Comparative Literature | 1 |
| Computer Software Engineering | 1 |
| Drama and Dramatics/Theatre Arts, General | 1 |
| Econometrics and Quantitative Economics | 1 |
| Economics, General | 1 |
| Electrical and Electronics Engineering | 1 |
| Environmental Science | 1 |
| European Studies/Civilization | 1 |
| Fine/Studio Arts, General | 1 |
| French Language and Literature | 1 |
| Hispanic-American, Puerto Rican, and Mexican-American/Chicano Studies | 1 |
| Informatics | 1 |
| Music, General | 1 |
| Near and Middle Eastern Studies | 1 |
| Philosophy | 1 |
The data on this website is sourced as public domain data from the most recent survey year of the National Center for Education Statistics’ College Navigator tool. That tool can be found at this link: https://nces.ed.gov/collegenavigator/. MyCollegeSelection encourages students to explore multiple resources as part of the research process in selecting the college of their dreams.