Photo by Padrinan via Pixabay.com.
NOTE: The Almanac's key data source regarding average class sizes and student-teacher ratios (California Dept. of Education) has not provided updated reports by school district since the 2017-2018 school year. The Almanac has unsuccessfully returned for updated data at least annually since then. For those needing more current information, it may be found for specific schools, contained in School Accountability Report Cards (SARC) provided by California public schools to the California Department of Education.
Also see:
-- School Districts of Los Angeles County
-- Ethnic Distribution of Pupil by School District
-- Cost of Educating a Pupil, K-12, County-wide & by School District
-- LAUSD by the Numbers
K-12 Pupil-Teacher Ratio* by School Year and Latest Average Class Size. No updated data as of June 14, 2026.
| School District | Latest Data (2017-2018) |
1 Year Before (2016-2017) |
5 Years Before (2012-2013) |
School Year 2010-2011 | Average Class Size† (2016-2017) |
|---|---|---|---|---|---|
| Los Angeles County Overall | 20.6 | 20.4 | 22.2 | 22.2 | 25.0 |
| ABC Unified | 23.7 | 24.0 | 24.1 | 24.5 | 26.7 |
| Acton-Agua Dulce Unified | 20.4 | 13.2 | 24.9 | 23.9 | 15.8 |
| Alhambra Unified | 23.3 | 22.9 | 25.3 | 24.8 | 27.3 |
| Antelope Valley Union High | 21.5 | 22.0 | 23.1 | 24.0 | 26.6 |
| School District | Latest Data (2017-2018) |
1 Year Before (2016-2017) |
5 Years Before (2012-2013) |
School Year 2010-2011 | Average Class Size† (2016-2017) |
| Arcadia Unified | 22.2 | 23.0 | 24.5 | 22.8 | 26.0 |
| Azusa Unified | 18.7 | 19.5 | 20.3 | 22.5 | 24.3 |
| Baldwin Park Unified | 20.2 | 20.6 | 20.2 | 21.3 | 19.7 |
| Bassett Unified | 21.2 | 21.0 | 23.0 | 24.7 | 22.8 |
| Bellflower Unified | 20.9 | 20.7 | 24.5 | 24.1 | 24.7 |
| School District | Latest Data (2017-2018) |
1 Year Before (2016-2017) |
5 Years Before (2012-2013) |
School Year 2010-2011 | Average Class Size† (2016-2017) |
| Beverly Hills Unified | 15.6 | 15.3 | 17.0 | 18.0 | 21.7 |
| Bonita Unified | 23.2 | 23.5 | 25.0 | 25.5 | 25.8 |
| Burbank Unified | 21.5 | 21.8 | 22.5 | 23.9 | 26.8 |
| Castaic Union | 23.8 | 24.3 | 20.7 | 22.0 | 24.2 |
| Centinela Valley Union High | 20.3 | 20.0 | 24.7 | 23.6 | 24.9 |
| School District | Latest Data (2017-2018) |
1 Year Before (2016-2017) |
5 Years Before (2012-2013) |
School Year 2010-2011 | Average Class Size† (2016-2017) |
| Charter Oak Unified | 23.5 | 23.1 | 26.6 | 27.7 | 25.7 |
| Claremont Unified | 23.2 | 23.4 | 23.5 | 25.6 | 27.0 |
| Compton Unified | 22.5 | 22.2 | 23.8 | 21.6 | 24.8 |
| Covina-Valley Unified | 21.9 | 21.9 | 23.6 | 24.0 | 25.2 |
| Culver City Unified | 22.0 | 21.7 | 23.5 | 24.5 | 25.8 |
| School District | Latest Data (2017-2018) |
1 Year Before (2016-2017) |
5 Years Before (2012-2013) |
School Year 2010-2011 | Average Class Size† (2016-2017) |
| Downey Unified | 22.1 | 22.6 | 25.1 | 25.2 | 27.0 |
| Duarte Unified | 19.7 | 19.8 | 22.9 | 26.3 | 24.2 |
| East Whittier City | 22.8 | 22.6 | 21.7 | 20.9 | 25.5 |
| Eastside Union | 20.9 | 21.4 | 23.4 | 22.6 | 22.9 |
| El Monte City | 20.2 | 19.7 | 22.8 | 22.8 | 20.9 |
| School District | Latest Data (2017-2018) |
1 Year Before (2016-2017) |
5 Years Before (2012-2013) |
School Year 2010-2011 | Average Class Size† (2016-2017) |
| El Monte Union High | 21.4 | 21.5 | 21.9 | 23.0 | 18.4 |
| El Rancho Unified | 22.8 | 22.8 | 23.9 | 24.2 | 27.1 |
| El Segundo Unified | 23.1 | 22.0 | 24.0 | 25.2 | 27.6 |
| Garvey | 20.3 | 20.8 | 24.1 | 22.9 | 25.0 |
| Glendale Unified | 23.1 | 22.5 | 23.0 | 23.9 | 27.8 |
| School District | Latest Data (2017-2018) |
1 Year Before (2016-2017) |
5 Years Before (2012-2013) |
School Year 2010-2011 | Average Class Size† (2016-2017) |
| Glendora Unified | 22.2 | 22.6 | 25.3 | 25.7 | 25.1 |
| Gorman Joint | 26.0 | 24.7 | 21.6 | 18.8 | 14.2 |
| Hacienda La Puente Unified | 21.8 | 22.0 | 22.3 | 22.2 | 25.5 |
| Hawthorne | 19.8 | 19.3 | 23.8 | 21.8 | 25.5 |
| Hermosa Beach City | 21.7 | 21.9 | 13.3 | 20.6 | 25.6 |
| School District | Latest Data (2017-2018) |
1 Year Before (2016-2017) |
5 Years Before (2012-2013) |
School Year 2010-2011 | Average Class Size† (2016-2017) |
| Hughes-Elizabeth Lakes Union Elementary | 23.9 | 23.1 | 20.1 | 22.0 | 22.4 |
| Inglewood Unified | 21.1 | 20.8 | 26.4 | 23.6 | 23.4 |
| Keppel Union | 18.9 | 20.5 | 22.5 | 22.0 | 23.6 |
| La Cañada Unified | 22.8 | 22.1 | 23.0 | 23.6 | 25.3 |
| Lancaster | 23.0 | 22.9 | 25.1 | 25.4 | 24.0 |
| School District | Latest Data (2017-2018) |
1 Year Before (2016-2017) |
5 Years Before (2012-2013) |
School Year 2010-2011 | Average Class Size† (2016-2017) |
| Las Virgenes Unified | 22.5 | 22.8 | 22.9 | 23.9 | 25.2 |
| Lawndale Elementary | 20.2 | 20.2 | 22.4 | 23.1 | 25.1 |
| Lennox | 17.9 | 18.3 | 19.7 | 21.7 | 23.9 |
| Little Lake City | 20.9 | 21.8 | 26.1 | 24.3 | 23.5 |
| Long Beach Unified | 24.0 | 24.3 | 25.5 | 23.2 | 27.5 |
| School District | Latest Data (2017-2018) |
1 Year Before (2016-2017) |
5 Years Before (2012-2013) |
School Year 2010-2011 | Average Class Size† (2016-2017) |
| Los Angeles County Office of Education | 13.4 | 8.6 | 5.6 | 10.9 | 18.5 |
| Los Angeles Unified | 19.3 | 19.1 | 20.9 | 20.2 | 24.7 |
| Los Nietos | 20.5 | 20.3 | 26.0 | 23.8 | 23.2 |
| Lowell Joint | 24.3 | 25.4 | 27.0 | 28.2 | 26.8 |
| Lynwood Unified | 24.5 | 23.2 | 26.4 | 29.6 | 25.5 |
| School District | Latest Data (2017-2018) |
1 Year Before (2016-2017) |
5 Years Before (2012-2013) |
School Year 2010-2011 | Average Class Size† (2016-2017) |
| Manhattan Beach Unified | 22.5 | 23.7 | 22.7 | 23.4 | 26.3 |
| Monrovia Unified | 21.7 | 21.2 | 24.0 | 25.1 | 25.0 |
| Montebello Unified | 24.2 | 24.5 | 25.2 | 28.9 | 27.7 |
| Mountain View | 21.8 | 22.1 | 25.5 | 25.3 | 23.1 |
| Newhall | 21.9 | 22.1 | 23.0 | 25.4 | 24.5 |
| School District | Latest Data (2017-2018) |
1 Year Before (2016-2017) |
5 Years Before (2012-2013) |
School Year 2010-2011 | Average Class Size† (2016-2017) |
| Norwalk-La Mirada Unified | 21.8 | 22.6 | 24.0 | 25.1 | 26.7 |
| Palmdale | 22.1 | 22.6 | 25.5 | 26.0 | 25.2 |
| Palos Verdes Peninsula Unified | 22.9 | 23.4 | 24.2 | 23.4 | 27.5 |
| Paramount Unified | 20.2 | 20.3 | 24.7 | 25.0 | 26.7 |
| Pasadena Unified | 20.3 | 21.6 | 21.1 | 24.0 | 24.2 |
| School District | Latest Data (2017-2018) |
1 Year Before (2016-2017) |
5 Years Before (2012-2013) |
School Year 2010-2011 | Average Class Size† (2016-2017) |
| Pomona Unified | 12.3 | 13.4 | 16.9 | 23.6 | 25.5 |
| Redondo Beach Unified | 22.9 | 23.0 | 24.9 | 23.9 | 27.6 |
| Rosemead Elementary | 21.8 | 21.2 | 24.4 | 25.0 | 22.2 |
| Rowland Unified | 23.7 | 23.3 | 22.9 | 23.3 | 21.5 |
| San Gabriel Unified | 21.6 | 19.4 | 21.4 | 25.1 | 26.0 |
| School District | Latest Data (2017-2018) |
1 Year Before (2016-2017) |
5 Years Before (2012-2013) |
School Year 2010-2011 | Average Class Size† (2016-2017) |
| San Marino Unified | 20.3 | 20.0 | 22.2 | 24.1 | 22.9 |
| Santa Monica-Malibu Unified | 18.9 | 19.6 | 21.7 | 20.8 | 23.1 |
| Saugus Union | 23.3 | 23.4 | 26.0 | 25.5 | 25.8 |
| SBE - Academia Avance Charter** | 17.8 | 23.1 | 0.0 | 0.0 | 23.6 |
| SBE - Anahuacalmecac International University Preparatory of North America** | 19.1 | 19.9 | 0.0 | 0.0 | 24.8 |
| School District | Latest Data (2017-2018) |
1 Year Before (2016-2017) |
5 Years Before (2012-2013) |
School Year 2010-2011 | Average Class Size† (2016-2017) |
| SBE - Barack Obama Charter** | 25.8 | 22.2 | 30.3 | 26.1 | 25.2 |
| SBE - Celerity Himalia** | 29.3 | 0.0 | 0.0 | 0.0 | 0.0 |
| SBE - New West Charter** | 20.1 | 21.2 | 26.0 | 24.0 | 24.4 |
| SBE - Prepa Tec Los Angeles High** | 14.9 | 12.4 | 0.0 | 0.0 | 20.4 |
| SBE - The School of Arts and Enterprise** | 22.1 | 17.6 | 19.6 | 25.0 | 24.1 |
| School District | Latest Data (2017-2018) |
1 Year Before (2016-2017) |
5 Years Before (2012-2013) |
School Year 2010-2011 | Average Class Size† (2016-2017) |
| South Pasadena Unified | 23.4 | 23.4 | 24.1 | 25.3 | 24.2 |
| South Whittier | 23.1 | 23.1 | 28.4 | 26.6 | 25.7 |
| Sulphur Springs Union | 23.7 | 24.6 | 23.4 | 23.6 | 24.9 |
| Temple City Unified | 22.9 | 23.2 | 25.6 | 24.1 | 25.9 |
| Torrance Unified | 22.1 | 21.6 | 25.3 | 28.9 | 26.9 |
| School District | Latest Data (2017-2018) |
1 Year Before (2016-2017) |
5 Years Before (2012-2013) |
School Year 2010-2011 | Average Class Size† (2016-2017) |
| Valle Lindo | 20.2 | 21.1 | 26.4 | 23.5 | 22.6 |
| Walnut Valley Unified | 23.1 | 23.4 | 25.4 | 26.7 | 26.0 |
| West Covina Unified | 22.3 | 20.3 | 23.5 | 24.4 | 24.7 |
| Westside Union | 25.5 | 25.9 | 26.2 | 25.9 | 27.1 |
| Whittier City | 24.1 | 22.8 | 25.8 | 27.2 | 24.2 |
| School District | Latest Data (2017-2018) |
1 Year Before (2016-2017) |
5 Years Before (2012-2013) |
School Year 2010-2011 | Average Class Size† (2016-2017) |
| Whittier Union High | 24.7 | 25.0 | 28.4 | 28.0 | 28.2 |
| William S. Hart Union High | 22.6 | 22.4 | 24.1 | 25.9 | 26.6 |
| Wilsona Elementary | 21.1 | 21.9 | 25.9 | 27.8 | 23.5 |
| Wiseburn Unified | 21.7 | 23.7 | 22.5 | 23.0 | 25.2 |
* Pupil-teacher ratio is the number of pupils enrolled in a school district divided by the number of teachers in the district. Pupil-teacher ratio is the statistic most commonly used to compare data across states, and should not be confused with average class size.
** SBE - State Board of Education Charter
† Lastest data available. Calculation: enrollment in classes divided by the number of classes (excludes special education classes, other instruction-related assignments, department chairs, classes with no enrollment, classes with enrollment over 50)
Source: California Dept. of Education
