About 7% of adolescents aged 12 to 17 reported drinking alcohol in the past month as of 2021, according to the National Survey on Drug Use and Health. That number has dropped significantly over the past two decades, but alcohol remains the most widely used substance among American teenagers. The rates climb steeply with age: roughly 11% of 8th graders, 24% of 10th graders, and 41% of 12th graders reported drinking at least once in the past year, based on 2025 data from the Monitoring the Future survey.
Drinking Rates by Grade Level
The jump between middle school and the end of high school is dramatic. Among 8th graders (typically 13 or 14 years old), about 11% reported drinking in the past year. By 10th grade, that figure more than doubles to roughly 24%. And by senior year, 41% of students say they drank alcohol at least once in the prior 12 months. This steep curve reflects how alcohol becomes more socially available as teens get older, attend more unsupervised gatherings, and gain access through older friends or siblings.
When Most Teens Have Their First Drink
The most common age for a first drink falls between 15 and 16, with about a third of students reporting they started in that window. Roughly a quarter first tried alcohol at 13 or 14. A smaller but notable group, around 4 to 5%, reported drinking before age 9. On the other end, about 22 to 27% of high school seniors said they had never had more than a sip.
Earlier initiation matters because it tracks with heavier drinking later. Students who start drinking at 13 or 14 are more likely to binge drink and mix alcohol with other substances by the time they reach their senior year, compared to those who wait until 15 or 16.
Binge Drinking Among High Schoolers
Binge drinking, defined for teens as four or more drinks in a couple of hours for girls and five or more for boys, is where the health risks escalate sharply. Data from the Youth Risk Behavior Survey found that 13% of high school students earning mostly A’s reported binge drinking in the past month, while 23% of students with mostly D’s and F’s did the same. That connection between heavy drinking and academic performance runs in both directions: alcohol impairs learning and memory, and students already struggling in school may be more likely to drink.
Where Teens Get Alcohol
The most common source isn’t a fake ID or a convenience store. Research consistently finds that someone aged 21 or older is the primary supplier. Among 9th graders who drank, 46% got their alcohol from an adult. By 12th grade, 60% did. The second most common source for high schoolers is another person under 21, typically a friend or classmate, accounting for about 29% of cases.
Home is a particularly important source for younger teens. Some parents intentionally allow supervised drinking, while in other cases teens simply access alcohol that’s available in the house. As teenagers get older, they rely less on what’s at home and more on social networks.
How Alcohol Affects the Developing Brain
The teenage brain is still under construction, and alcohol disrupts that process in specific, measurable ways. The prefrontal cortex, the region responsible for planning, impulse control, and decision-making, doesn’t finish maturing until the mid-20s. Heavy drinking during adolescence has been linked to actual reductions in the size of this area, along with the hippocampus (critical for learning and memory) and the amygdala (involved in processing fear and emotional responses).
Blackouts, or gaps in memory after drinking, happen because alcohol blocks the transfer of information from short-term to long-term memory storage in the hippocampus. For a brain that’s still developing its memory systems, this disruption is more damaging than it would be for an adult. Researchers at the National Institute on Alcohol Abuse and Alcoholism have also found that heavy adolescent drinking weakens the connections between brain regions that regulate both emotional and cognitive functioning, changes that can persist well beyond the drinking episodes themselves.
Alcohol-Related Traffic Deaths in Young People
Alcohol-impaired driving remains one of the deadliest consequences of underage drinking. In 2023, there were 5,133 drivers aged 15 to 20 involved in fatal traffic crashes nationwide. One in five of those drivers, about 1,030, were alcohol-impaired. Among children 14 and younger, 25% of all traffic fatalities (253 deaths) occurred in crashes involving an alcohol-impaired driver, meaning many young victims weren’t drinking themselves but were passengers or bystanders.
These numbers represent a fraction of the overall toll. Across all age groups, 12,429 people died in alcohol-impaired driving crashes in 2023. Teen drivers are especially vulnerable because they’re combining inexperience behind the wheel with a substance that impairs the very brain regions responsible for judgment and reaction time.
The Overall Trend Is Declining
Despite these risks, the broader trend is encouraging. Teen drinking rates have fallen substantially since their peak in the late 1990s and early 2000s. The current rate of 7% of 12-to-17-year-olds drinking in the past month is well below historical levels. Several factors likely contribute: stricter enforcement of minimum drinking age laws, changing social norms among young people, and increased awareness of alcohol’s effects on developing brains. Still, with roughly 4 in 10 high school seniors drinking at least once a year, alcohol use remains a significant part of the adolescent landscape in the United States.