Los Osos High (Chaffey Joint Union High SCH DIST.), California - School Profile in 2023-2024 School Year

Updated on August 8, 2025.

Los Osos High is a High in Rancho Cucamonga, CA. It currently serves 2759 students (grades 09-12). The school is part of the Chaffey Joint Union High School District.

Below, we provide details about the school including the population per grade, the racial demography of the student population, the racial demography of the student population per gender/sex, and the racial demography per grade level.

You can see similar information for other schools in Chaffey Joint Union High School District and all schools in California.

Other Details

School Type: Regular School

School Level: High

Number of Students:2759

Number of Teachers: 111

Student/Teacher Ratio: 24.90

Location Info

Location: 6001 Milliken Ave., Rancho Cucamonga, CA 91737

Mailing Address: 6001 Milliken Ave., Rancho Cucamonga, CA 91737-7709

Phone: (909)477-6900

Website: http://www.cjuhsd.net

Data Source: NCES.

Student Population Per Grade

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Grade	Population
Grade 10	698
Grade 11	698
Grade 12	739
Grade 9	624

Gender/Sex of Los Osos High Student Population

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Gender	Population	Percent of Population (%)
Male	1376	49.87
Female	1382	50.09

Race/Ethnicity Demography of Los Osos High Student Population

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Race/Ethnicity	Population	Percent of Population (%)
American Indian or Alaska Native	9	0.33
Asian	606	21.96
Black or African American	165	5.98
Hispanic/Latino	1122	40.67
Native Hawaiian or Other Pacific Islander	5	0.18
Two or more races	102	3.70
White	749	27.15

Male - Race/Ethnicity Demography of Student Population

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Race/Ethnicity	Population	Percent of Population (%)
American Indian or Alaska Native	5	0.36
Asian	324	23.55
Black or African American	76	5.52
Hispanic/Latino	547	39.75
Native Hawaiian or Other Pacific Islander	1	0.07
Two or more races	51	3.71
White	372	27.04

Female - Race/Ethnicity Demography of Student Population

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Race/Ethnicity	Population	Percent of Population (%)
American Indian or Alaska Native	4	0.29
Asian	282	20.41
Black or African American	89	6.44
Hispanic/Latino	575	41.61
Native Hawaiian or Other Pacific Islander	4	0.29
Two or more races	51	3.69
White	377	27.28

Race Demography Per Grade

The tables below shows the Race/Ethnicity of the student population per grade.

Grade 10 - Race/Ethnicity of Both Genders

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Race/Ethnicity	Population	Percent of Population (%)
American Indian or Alaska Native	1	0.14
Asian	161	23.07
Black or African American	49	7.02
Hispanic/Latino	288	41.26
Native Hawaiian or Other Pacific Islander	1	0.14
Two or more races	24	3.44
White	174	24.93

Grade 11 - Race/Ethnicity of Both Genders

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Race/Ethnicity	Population	Percent of Population (%)
American Indian or Alaska Native	1	0.14
Asian	135	19.34
Black or African American	39	5.59
Hispanic/Latino	304	43.55
Two or more races	22	3.15
White	196	28.08

Grade 12 - Race/Ethnicity of Both Genders

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Race/Ethnicity	Population	Percent of Population (%)
American Indian or Alaska Native	5	0.68
Asian	176	23.82
Black or African American	42	5.68
Hispanic/Latino	265	35.86
Native Hawaiian or Other Pacific Islander	3	0.41
Two or more races	20	2.71
White	228	30.85

Grade 9 - Race/Ethnicity of Both Genders

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Race/Ethnicity	Population	Percent of Population (%)
American Indian or Alaska Native	2	0.32
Asian	134	21.47
Black or African American	35	5.61
Hispanic/Latino	265	42.47
Native Hawaiian or Other Pacific Islander	1	0.16
Two or more races	36	5.77
White	151	24.20