Lennox is a census-designated place (CDP) in the South Bay region of Los Angeles County, California, United States. The population was 22,753 at the 2010 census, down from 22,950 at the 2000 census.

Centinela Valley Union High School District, (CVUHSD) is a public union high school district located in southern California that serves about 6,800 students in grades 9–12 from all of Lawndale and Lennox, most of Hawthorne and Alondra Park, and a small portion of Inglewood. The district's three associated elementary feeder school districts are Hawthorne School District, Lawndale Elementary School District, and Lennox School District. Previously Wiseburn Unified School District, now a unified district, fed into CVUSD. The Centinela Valley district also offers adult education classes.