California's student body is diverse

California has the largest population in America, with diversity second only to Hawaii. Diversity has many forms, and this lesson explores several of them — Ethnic and racial diversity, linguistic diversity, religious diversity, sexual orientation, and gender identity.

About 6 million of California's nearly 40 million residents are students in K-12 schools. Relative to other states, California's population is fairly youthful.

Ethnic and racial diversity

People from all over the world move to the Golden State to live, work, and learn. People also move away, as summarized in a data-rich visual report from CalMatters titled California Migration. In 2019, California's level of population inflow/outflow was generally comparable to other states according to the CalMatters analysis, but the demographic history of the state has been dominated by growth through immigration.

Over a period of roughly 30 years, the state’s K-12 schools added about 2 million Hispanic/Latino students, accounting for all of the net growth in California K-12 enrollment. More than half of K-12 students in the state are Latino.

As of 2023, Hispanic/Latino students made up 56% of the student body of California's public schools. Non-Hispanic white students accounted for 20%. Most of the remaining students were Asian (9.5%), African-American (4.7%), or Filipino (2.2%). About 7% of California students associate themselves with none of the above or a blend of two or more.

Over ~30 years, California's student body grew by more than 2 million Hispanic/Latino students. This huge shift accounted for all of the net growth in California enrollment.

California's student body is very different than that of the United States as a whole, as this chart shows:

Diverse, but not necessarily blended

As a whole, the student body of California is impressively diverse. In practice, people tend to live in clusters.

For example, only a tiny percentage of California's total student body is Armenian or Persian, but these are sizable cultural groups in Glendale. In Pacifica, many students speak Tagalog. In Westminster, many students speak Vietnamese. Yuba City is home to many Punjabi speakers.

San Francisco Unified School District has a diverse student body overall, but each school is its own community. Some schools are very diverse and others less so. In southern California, more than 250,000 students attend schools where more than 95% of students are Latino.

Demographers often measure ethnic diversity using the Diversity Index, a statistical evaluation of the odds that two people selected at random from a sample will be of a different ethnicity. Statewide, California's diversity index in 2023 was 69%, second only to Hawaii.

Students attending public K-12 schools in California are less ethnically diverse than the population as a whole, with a diversity index of 46%. Obviously, there's a big difference between statistical diversity at the state level and lived experience as an individual. You can check the diversity index of your school and district on Ed-Data.org.

California's linguistic diversity

Nearly half of California’s students speak a language other than English at home. The vast majority successfully learn English through their education; less than a quarter of California’s students are classified as English Language Learners (abbreviated EL or ELL), still in the process of reaching proficiency in English.

California’s public schools educate students from virtually every cultural and linguistic background on the planet.

Most of California's English Learners speak Spanish at home, but any given school might have a cluster of English Learners who speak Vietnamese (1.85% of English Learners), Mandarin (2.07%), Arabic (1.41%), Cantonese (1.09%), Russian (1.31%), or any of dozens of other languages. (Click image for 2023-24 data.)

Immigration status diversity

How many students are undocumented?

The biggest changes in California demographics have been driven by immigration, primarily from Mexico. Statistics regarding the immigration status of California’s students and their families are imprecise. As discussed in Lesson 2.9, undocumented students are a small part of this shift, accounting for perhaps one in every 30 students enrolled in California public schools.

In 1982 the US Supreme Court ruled 5-4 in Plyler v. Doe that immigration status may not serve as a condition for enrollment in American public schools. Access to public education is open to all students residing in the US, regardless of immigration status. This right includes higher education; the California Dream Act extended in-state tuition benefits to all residents. After about a decade of litigation, this policy was upheld by a unanimous ruling of the California state Supreme Court in 2010.

Religious identity

Pew Research studies the religious affiliation of adults.

Most young people adopt the religious affiliation of their parents. It follows that California's religious diversity reflects the history of immigration to the state. Catholics are the largest single group, reflecting the long history of immigration from Latin America. In 2023, Pew research highlighted the growth of religious non-affiliation. For more information about religious diversity in California, visit the Pew Research Center.

Sexual Orientation

California has played a leading role in moving the American public toward acceptance of another kind of diversity: sexual orientation and gender identity. For most young people, the struggle for marriage equality is history. Students are likely to know teachers or other adults who don't conceal their orientation.

The Williams Institute, a think tank at the UCLA School of Law, studies changing public views of sexual orientation and identity. What percentage of adults are gay, bisexual, or something else? What can be reasonably predicted about the future identities of today's students? It's hard to know, partly because people don't always feel inclined to disclose their feelings to themselves, much less some random researcher!

Gender Identity

Part of the experience of growing up is figuring yourself out, including sexual orientation and gender identity. In the past, these topics were widely taboo, but with each generation, the levels of acceptance and candor appear to be roughly doubling:

These big numbers, in total approaching a fifth of the youngest adult generation, are driving new understanding. In terms of sexual orientation and gender identity, American society is far more diverse than it lets on.

School systems play a critical role in supporting all children through their adolescence, in part by encouraging them to accept and respect themselves, as well as people different from themselves.

The SAFETY Act, effective Jan 1, 2025, prohibits school districts from requiring staff to disclose a student’s sexual orientation or gender identity. The law also protects school staff from retaliation if they refuse to notify parents of a child’s gender preference. Opponents are trying to overturn or invalidate this law.

This page was updated April 2025.