Only 25.2 percent of California teens get eight hours of sleep, slightly above U.S. average

Living through one’s teenage years is never easy, but for today’s teens, it seems harder than ever to enjoy a happy, healthy adolescence.

Late in 2021, the U.S. Surgeon General released a new advisory on youth mental health, drawing attention to rising rates of depressive symptoms, suicidal ideation and other mental health issues among young Americans. According to data cited in the advisory, up to one in five U.S. children aged 3 to 17 had a reported mental, emotional, developmental or behavioral disorder. Many of these worrying conditions predated the COVID-19 pandemic, which worsened mental health for many young people by disrupting their routines, limiting their social interactions, and increasing stress about the health of loved ones.

These trends in youth mental health can be attributed in part to detrimental shifts in young people’s lifestyle over time, including increased academic stress, growing use of digital media and worsening health habits. And one of the major potential culprits in the latter category is sleep.

According to the CDC, teenagers should sleep between 8–10 hours per 24-hour period. This level of sleep is associated with a number of better physical and mental health outcomes, including lower risk of obesity and fewer problems with attention and behavior. Despite this, less than a quarter of teens report sleeping at least eight hours per day — a number that has fallen significantly over the last decade.

From 2007 to 2013, just under one-third of teens reported getting at least eight hours of sleep per night. In 2015, that number began to fall, and by 2019, only 22.1 percent of teens were meeting that threshold. One likely contributing factor is a rise in device usage over the same span. In 2007 — the same year that the iPhone launched — 24.9 percent of teens were spending more than three hours on their phone or computer in a given day. In 2019, that figure had risen to 46.1 percent.

While the overall numbers for teens’ sleep habits are concerning, some subgroups are getting more sleep than others. Age is one factor: as teenagers get older, the share reporting that they sleep at least eight hours declines. Among 9th graders, 28.9 percent are sleeping more than eight hours, but for 11th and 12th graders, only around 17 percent are. There is also a slight separation along gender lines, with 23.8 percent of males receiving adequate sleep compared to just 20.3 percent of females.

Another difference among teens’ sleep habits is geography. Teenagers in different states report different levels of sleep, along with other related habits like regular exercise or time spent with a phone, computer or TV. For example, a mere 15.7 percent of teenagers in New Jersey are getting enough sleep — just over half the percentage of well-rested teens in Montana (29.9 percent), the state with the highest reported share.

The data used in this analysis is from the CDC’s Youth Risk Behavior Surveillance System which surveys a representative sample of grade 9–12 students in U.S. schools. To determine the states where teens don’t sleep, researchers at calculated the percentage of high school students who reported getting eight hours of sleep on an average school night. In the event of a tie, the state with the larger share of students who spent at least three hours per day on a phone or computer (including video games) for non-school use was ranked higher.

The analysis found that only 25.2 percent of California high schoolers report getting eight hours of sleep on school nights.

Here is a summary of the data for California
• Teens who get 8 hours of sleep: 25.2 percent;
• Teens who spend more than 3 hours on phone/computer: 54.3 percent;
• Teens who don’t exercise: 21.0 percent; and
•Teens who watch more than 3 hours of TV: 18.5 percent.

For reference, here are the statistics for the entire United States
• Teens who get 8 hours of sleep: 22.1 percent;
• Teens who spend percent on phone/computer: 46.1 percent;
• Teens who don’t exercise: 17.0 percent; and
• Teens who watch percent: 19.8 percent.

For more information, a detailed methodology, and complete results, you can find the original report on’s website: