Addiction Drug Use Marijuana Statistics on Marijuana Use in Teens By Amy Morin, LCSW, Editor-in-Chief Updated on February 14, 2022 Medically reviewed Verywell Mind articles are reviewed by board-certified physicians and mental healthcare professionals. Medical Reviewers confirm the content is thorough and accurate, reflecting the latest evidence-based research. Content is reviewed before publication and upon substantial updates. Learn more. by Steven Gans, MD Medically reviewed by Steven Gans, MD Steven Gans, MD is board-certified in psychiatry and is an active supervisor, teacher, and mentor at Massachusetts General Hospital. Learn about our Medical Review Board Fact checked Verywell Mind content is rigorously reviewed by a team of qualified and experienced fact checkers. Fact checkers review articles for factual accuracy, relevance, and timeliness. We rely on the most current and reputable sources, which are cited in the text and listed at the bottom of each article. Content is fact checked after it has been edited and before publication. Learn more. by Emily Swaim Fact checked by Emily Swaim LinkedIn Emily is a board-certified science editor who has worked with top digital publishing brands like Voices for Biodiversity, Study.com, GoodTherapy, Vox, and Verywell. Learn about our editorial process Print Doug Menuez / Photodisc / Getty Images Table of Contents View All Table of Contents Statistics Effects Risks Medical Marijuana and CBD Talking to Teens Frequently Asked Questions More than 48 million Americans over the age of 12 have used marijuana in the last year according to the 2019 National Survey on Drug Use and Health, making it the most common illicit drug used in the United States. Roughly 22.2 million use it every month. Marijuana is also surprisingly available to youths, even in middle school. In 2019, nearly one-third of 8th graders said it would be "fairly easy" or "very easy" to get marijuana. Nearly 60% of 10th graders and over three-quarters of 12th graders said the same. The marijuana legalization movement has played a role in sending mixed messages to young people that marijuana is safe because "it's medicine" or "it's legal." This leaves it up to parents to help set things straight. By understanding the risks, dangers, facts, and statistics on teen marijuana use, you can better address the issue with your teen. Other Names for Marijuana Marijuana is a drug that is known by many different names. Some of the most common, and ones that your teen may be most familiar with, include:PotWeedGrassDopeHerb Teen Marijuana Use Statistics One of the best ways to prepare yourself to talk about marijuana use is to learn the latest statistics, particularly as they relate to teens. Here's what we know about teen marijuana use: More than one in three high school students (37%) have used marijuana, with one in five (22%) admitting to using this drug within the past month. The older a teen is, the more likely they are to have tried marijuana. Almost 30% of 10th graders admit to having tried marijuana while this percentage increases to 44.5% for those in the 12th grade. In general, more males than females use marijuana. Although, some schools have found that usage among male teens is declining while usage rates are remaining steady for female teens. Teens identifying as nonbinary or not heterosexual are more likely to try marijuana than cisgender or heterosexual teens, especially if they are distressed about their gender identity. As far as marijuana form, most teens prefer to consume this drug by smoking it, accounting for one-half of its use. This is followed by dabbing (one in eight), consuming edibles (one in nine), vaping (one in 15), and drinking marijuana beverages (one in 30). Between 2017 and 2020, the rate of high school seniors vaping marijuana more than doubled, with over a fifth reporting vaping THC within the past year. Roughly 8% of 8th graders also reported vaping marijuana at least once in the past 12 months. Signs Your Teens May Be Using Marijuana Signs that your teen might be using marijuana include an otherwise unexplained change in behavior, increased irritability, loss of interest in usual activities, trouble with their memory. Physical signs of recent marijuana use include red eyes and an increased appetite (also referred to as "the munchies"). At What Age Do Children Generally Start Smoking Pot? How Marijuana Affects Teen Brains A teen's brain does not finish developing until roughly 25 years of age. Using marijuana before this development is complete can impact their brain's structure and function. Though results are mixed, some research has found that teens who regularly use marijuana alter the connectivity of the pathways in their brain, and some of their brain regions are smaller as well—particularly those associated with memory, learning, and impulse control. Abnormality in brain structure may be even greater in female teens that use marijuana when compared to males. One 2012 study also found that participants who had begun persistent cannabis use in their teens lost an average of eight IQ points, even after controlling for years of education. Risks of Teen Marijuana Use Some view teen marijuana use as "not a big deal." However, there are certain risks associated with using this drug in your younger years. Mental Health Issues People who start using marijuana in adolescence are more likely to experience early-onset psychosis. Usually, the heavier the usage, the more severe the symptoms. Although the direction of causation is still unclear, a common theory is that marijuana can exacerbate pre-existing vulnerability to psychosis, "tipping the scales" for people who otherwise wouldn't have developed symptoms. Marijuana use may also precede depression. According to a study published in JAMA Psychiatry, cannabis use during the teen years is linked to higher rates of major depression as well as suicidal thoughts later in life. Cognitive Problems Teen marijuana use can be particularly problematic on a cognitive or brain-based level because it can impact the adolescent's: Attention or focusDecision-makingInhibition and impulse controlLearning abilityMemoryVerbal fluency Some of these cognitive issues are thought to occur due to marijuana changing the chemical structure of the brain. Others are suspected to be a result of the drug being toxic to brain tissue. Addiction About one in six people who start using marijuana as a teen become addicted. People who begin using marijuana before age 18 are also four to seven times more likely to develop a marijuana use disorder than adults. In those that use marijuana every day, somewhere between 25% and 50% develop an addiction. As with most addictive substances and behaviors, the rewarding effects of marijuana (such as the "marijuana high") are central to it being addictive. Signs that your teen may have cannabis use disorder include using this substance more than they intend, experiencing cravings for it, or use that interferes with other activities in their lives. Impaired Driving Driving while under the influence of marijuana can double the risk of a car accident in young drivers, and the risk is even greater when small amounts of alcohol are also consumed. Researchers have found that marijuana use affects the driver's concentration and ability to perceive time and distance, which may lead to poor speed control, drowsiness, distraction, and the inability to read road signs accurately. Marijuana is the most common illicit drug found in drivers who die in accidents—around 14% of drivers—and sometimes in combination with alcohol or other drugs. Declines in School Performance Students who smoke marijuana are more likely than their non-using peers to get poor grades and drop out of high school. Dropping out of school comes with a variety of consequences. This includes a higher risk of poverty, lower earning capacity, and sometimes even poorer physical health. Teen marijuana use can also impact in-school behaviors. Some studies have found that problems at school are more common in teens using marijuana, particularly when those teens are male. Other Health Risks Marijuana has many negative health effects. For instance, its smoke contains 50% to 75% more of certain cancer-causing substances than cigarette smoke. Although evidence is mixed, some studies suggest that heavy marijuana use could increase the risk of lung cancer. When teens smoke or vape marijuana, they put their lungs at risk. As of February 18, 2020, there have been 2,807 cases of e-cigarette or vaping product use-associated lung injury (EVALI) across the U.S. Most of the EVALI cases have been linked to devices containing tetrahydrocannabinol (THC), the ingredient in cannabis that causes the high. Why Marijuana Use in Teens Is Harmful Medical Marijuana and CBD Recreational marijuana use is legal in 18 U.S. states—but only for adults 21 and older, not for teens. Not even the most adamant legalization advocates propose making it legal for children to use marijuana. Laws for medical marijuana vary from state to state, but in most states, medical marijuana use for children or teens is only given for "qualifying medical conditions." In Washington, for example, qualifying conditions include cancer, chronic kidney failure, and traumatic brain injury. The problem with medical marijuana is, even in states that allow it, this drug is not regulated by a governmental agency. Therefore, it's uncertain whether the marijuana being purchased is safe. It's also unknown how strong or pure it is. Cannabidiol (CBD) is another substance that is derived from the cannabis plant. Yet, the only CBD-containing product currently authorized by the Food and Drug Administration (FDA) for use in teens is Epidiolex, a drug used to help treat rare and severe forms of epilepsy. Talking to Teens About Marijuana Don't wait for your teen to bring up the subject of marijuana. Start a conversation today. Find out what your teen knows already and be prepared to share the facts. Hold ongoing conversations about the dangers of marijuana use. Discuss changes in the law or bring up the subject when there are stories about marijuana in the news. Take steps to build credibility so your teen will value what you have to say. Discuss the dangers of using marijuana and make sure your teen fully understands the risks—even the risks associated with occasional substance use. Find out what your teen is hearing from other sources too. Friends, social media, and other websites often promote marijuana, and they may give your teen false information about drugs. It's important for you to be able to provide factual data. A Word From Verywell Knowing the statistics on marijuana use can help you when discussing this topic with your teen. Understanding the effects of teen marijuana use also enables you to share this information so your teen knows the impact that marijuana use can have on their growing bodies. If you or a loved one are struggling with substance use or addiction, contact the Substance Abuse and Mental Health Services Administration (SAMHSA) National Helpline at 1-800-662-4357 for information on support and treatment facilities in your area. For more mental health resources, see our National Helpline Database. Frequently Asked Questions Which state has the highest teen marijuana use? Rhode Island has the highest teen marijuana use at 18.7%. It is followed by Colorado, Vermont, the District of Columbia, and Washington. Compare this to Louisiana and Utah, the two states with the lowest teen marijuana use at 6.3%. Does teen use of marijuana increase in states where marijuana has been legalized? The evidence is mixed. Some research has connected marijuana legalization with increased use among youth. Other studies have found that legalization not only doesn't increase teen marijuana use but may even decrease, due in part to dispensaries replacing drug dealers and requiring proof of age to purchase it. Can parents who condone teen marijuana use get in trouble? Every state has different laws, some of which could put a parent in legal trouble if they condone teen marijuana use. In one such case, a mom was charged with felony chemical endangerment of a child for allowing her teen son to smoke marijuana. Parents who use marijuana with their teens can also get in trouble in some states as well. Child Protective Services may even step in if it feels that the parent's attitudes or drug-related parenting practices are putting a teen at risk. 29 Sources Verywell Mind uses only high-quality sources, including peer-reviewed studies, to support the facts within our articles. Read our editorial process to learn more about how we fact-check and keep our content accurate, reliable, and trustworthy. Substance Abuse and Mental Health Services Administration. Key substance use and mental health indicators in the United States: Results from the 2019 National Survey on Drug Use and Health. Centers for Disease Control and Prevention. Marijuana and public health: Marijuana fast facts and fact sheets. National Institute on Drug Abuse. Monitoring the future: National survey results on drug use 1975-2020. Centers for Disease Control and Prevention. Marijuana and public health: Teens. C.S. Mott Children's Hospital. Marijuana and teens. National Institute on Drug Abuse. Substance use in women research report: Sex and gender differences in substance use. Centers for Disease Control and Prevention. Morbidity and Mortality Weekly Report: Trends and characteristics in marijuana use among public school students — King County, Washington, 2004-2016. Buttazzoni A, Tariq U, Thompson-Haile A, Burkhalter R, Cooke M, Minaker L. Adolescent gender identity, sexual orientation, and cannabis use: Potential mediations by internalizing disorder risk. Health Educ Behav. 2020;48(1):82-92. doi:10.1177/1090198120965509 Washington State Department of Health. 2018 Washington State Healthy Youth Survey. Data brief: Marijuana. American Academy of Child & Adolescent Psychiatry. Marijuana and teens. National Institute on Drug Abuse. Marijuana research report: What are marijuana's long-term effects on the brain?. Meier MH, Caspi A, Ambler A, et al. Persistent cannabis users show neuropsychological decline from childhood to midlife. PNAS. 2012;109(40):E2657-E2664. doi:10.1073/pnas.1206820109 Stefanis NC, Dragovic M, Power BD, Jablensky A, Castle D, Morgan V. Age at initiation of cannabis use predicts age at onset of psychosis: The 7- to 8-year trend. Schizophr Bull. 2013;39(2):251-254. doi:10.1093/schbul/sbs188 Gobbi G, Atkin T, Zytynski T, et al. Association of cannabis use in adolescence and risk of depression, anxiety, and suicidality in young adulthood: A systematic review and meta-analysis. JAMA Psychiatry. 2019;76(4):426-34. doi:10.1001/jamapsychiatry.2018.4500 Jacobus J, Tapert SF. Effects of cannabis on the adolescent brain. Curr Pharm Des. 2014;20(13):2186-2193. National Institute on Drug Abuse. Marijuana research report. National Institute on Drug Abuse. Marijuana facts for teens. Hartman RL, Huestis MA. Cannabis effects on driving skills. Clin Chem. 2013;59(3):478-92. doi:10.1373/clinchem.2012.194381 Centers for Disease Control and Prevention. What you need to know about marijuana use in teens. American Public Health Association. The dropout crisis: A public health problem and the role of school-based health care. Callaghan R, Allebeck P, Sidorchuk A. Marijuana use and risk of lung cancer: A 40-year cohort study. Cancer Causes Control. 2013;24:1811-20. doi:10.1007/s10552-013-0259-0 Centers for Disease Control and Prevention. Outbreak of lung injury associated with the use of e-cigarette, or vaping, products. National Conference of State Legislatures. State medical marijuana laws. Washington State Department of Health. Medical marijuana: qualifying conditions. U.S. Food and Drug Administration. FDA approves first drug comprised of an active ingredient derived from marijuana to treat rare, severe forms of epilepsy. Moss J, Liu B, Zhu L. State prevalence and ranks of adolescent substance use: implications for cancer prevention. Prev Chronic Dis. 2018;15:170345. doi:10.5888/pcd15.170345 Bailey J, Epstein M, Roscoe J, Oesterle S, Kosterman R, Hill K. Marijuana legalization and youth marijuana, alcohol, and cigarette use and norms. Am J Prevent Med. 2020;59(3):309-16. doi:10.1016/j.amepre.2020.04.008 Anderson DM, Hansen B, Rees D. Association of marijuana laws with teen marijuana use: New estimates from the youth risk behavior surveys. JAMA Pediatr. 2019;173(9):879-81. doi:10.1001/jamapediatrics.2019.1720 U.S. Department of Health and Human Services. Child abuse and neglect user manual series; Protecting children in families affected by substance use disorders. Additional Reading Jacobus J, Tapert S. Effects of cannabis on the adolescent brain. Current Pharmaceutical Design. 2014;20(13):2186-2193. National Institute on Drug Abuse. DrugFacts: Monitoring the Future Survey: High school and youth trends. Substance Abuse and Mental Health Services Administration. Results From the 2017 National Survey on Drug Use and Health: Detailed tables. Department of Health and Human Services. By Amy Morin, LCSW, Editor-in-Chief Amy Morin, LCSW, is the Editor-in-Chief of Verywell Mind. She's also a licensed clinical social worker, psychotherapist, and international bestselling author. Her books, including "13 Things Mentally Strong People Don't Do," have been translated into more than 40 languages. Her TEDx talk, "The Secret of Becoming Mentally Strong," is one of the most viewed talks of all time. Edited by Christina DeBusk Christina DeBusk Christina DeBusk is a personal trainer and nutrition specialist. Learn about our editorial process See Our Editorial Process Meet Our Review Board Share Feedback Was this page helpful? Thanks for your feedback! What is your feedback? Other Helpful Report an Error Submit Get Treatment for Addiction Advertiser Disclosure × The offers that appear in this table are from partnerships from which Verywell Mind receives compensation.