Teen Marijuana Use Hits Record Low as Adult Legalization Expands

Survey Shows Steepest Decline in Past-Month Use

Past-month marijuana use among high school seniors dropped to 11.4 percent in 2026, down from a peak of 23.1 percent in 1997. The Monitoring the Future study, conducted annually by the University of Michigan under contract with the National Institute on Drug Abuse, surveyed approximately 32,000 students in grades 8, 10, and 12 across 389 public and private schools. Eighth-grade past-month use fell to 3.2 percent. Tenth-grade use declined to 7.8 percent. Both mark all-time lows since the survey's inception in 1975.

Lifetime prevalence—students who report ever trying marijuana—also declined across all three grades. Among seniors, 29.1 percent reported lifetime use, compared to 49.7 percent in 1997. The data contradicts predictions made by opponents of legalization, who'd warned that state-licensed retail markets would increase adolescent exposure and normalize consumption.

State Legalization Timeline Tracks Opposite Direction

The decline in teen use accelerated after 2012, the same year Colorado and Washington became the first states to legalize adult recreational sales. Twenty-two additional states have enacted similar laws since then, bringing the total to 24 jurisdictions with operational retail markets. Medical cannabis programs operate in 38 states.

Researchers haven't identified a causal mechanism linking legalization to reduced youth use, but several hypotheses have gained traction. Licensed retailers face strict compliance audits and lose their licenses for selling to minors, whereas illicit dealers historically imposed no age checks. Public-health campaigns funded by cannabis excise taxes have also targeted youth prevention, and some surveys suggest that legalization has reduced marijuana's perceived rebelliousness among teenagers.

Perceived Risk and Availability Both Decline

The percentage of seniors who view regular marijuana use as carrying "great risk" fell to 18.9 percent in 2026, down from 58.1 percent in 1991. Yet consumption dropped in tandem. This inverse relationship—falling risk perception alongside falling use—challenges the assumption that anti-drug messaging must emphasize danger to be effective.

Perceived availability also declined. In 2026, 28.7 percent of seniors said marijuana would be "fairly easy" or "very easy" to obtain, compared to 88.5 percent in 1997. Regulated retail systems require ID checks and don't market to minors, which may restrict youth access more effectively than unregulated street sales.

Implications for Federal Scheduling and Policy Debate

The findings arrive as the Drug Enforcement Administration weighs a proposal to reclassify marijuana from Schedule I to Schedule III under the Controlled Substances Act. The DEA's notice of proposed rulemaking, published in May 2024, cited "accepted medical use" as the statutory basis for rescheduling. Public comments closed in July 2024. The agency hasn't announced a final decision timeline. Schedule III status would ease research restrictions and allow state-licensed businesses to deduct ordinary expenses under 26 U.S.C. § 280E, but wouldn't legalize marijuana federally or resolve the state-federal conflict.

Opponents of rescheduling, including the drug-policy group Smart Approaches to Marijuana, have argued that any form of liberalization will increase youth use. The Monitoring the Future data provides no support for that claim. For context and historical trends, see the CannIntel topic hub on youth marijuana use trends.

The next round of Monitoring the Future data, covering 2027, is scheduled for release in December 2027. Researchers will be watching whether the trend holds as additional states—including Pennsylvania and Minnesota—prepare to launch adult-use markets in 2027.