How many teens use marijuana?

Marijuana is the most commonly used illicit drug in the United States by teens as well as adults. After remaining mostly stable for many years, daily use of marijuana in 2019 increased among students in 8th and 10th grades compared to 2018 rates.

More than 1 in 5 students in 12th grade and nearly 1 in 5 students in 10th grade reported vaping marijuana in the past year. Past-month marijuana vaping among 12th graders nearly doubled in a single year—the second largest 1-year jump for any substance in the history of the Monitoring the Future survey. For the first time, the survey measured daily marijuana vaping, which was reported at 3.5 percent among 12th graders, 3.0 percent among 10th graders, and 0.8 percent among eighth graders.7

The chart below shows the percentage of teens who say they use marijuana.

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Monitoring the Future Study: Trends in Prevalence of Marijuana/ Hashish for 8th Graders, 10th Graders, and 12th Graders; 2019 (in percent)*
Drug Time Period 8th Graders 10th Graders 12th Graders
Marijuana/ Hashish Lifetime 15.20 34.00 43.70
Past Year 11.80 28.80 35.70
Past Month 6.60 18.40 22.30
Daily [1.30] [4.80] 6.40

Monitoring the Future 2019: Teen vaping climbs significantly. See table below for numerical representation
Monitoring the Future 2019: Daily marijuana use in lower grades increases but past year marijuana use steady. See table below for numerical representation
Monitoring the Future 2019: Illicit drug use. See table below for numerical representation

For more statistics on teen drug use, see NIDA’s Monitoring the Future study.

7 National Institute on Drug Abuse. Monitoring the Future Study: Trends in Prevalence of Various Drugs. Rockville, MD. December 2019. Available at https://www.drugabuse.gov/trends-statistics/monitoring-future/monitoring-future-study-trends-in-prevalence-various-drugs.