U.S. National/State Laws
Cannabis Laws in the United States
Federal law, state-by-state legality, medical and recreational breakdowns, and tax structures. Always verify with local authorities — laws change frequently.
26
Fully Legal
17
Medical Only
2
Decriminalized
6
Illegal
Federal Cannabis Law
While individual states have increasingly legalized cannabis, cannabis remains federally illegal under U.S. national law. This creates a unique legal tension: what is fully legal in one state is a federal crime everywhere. Understanding federal law is essential — it affects banking, taxes, transportation, employment, and even your ability to fly with cannabis.
The Controlled Substances Act (1970)
Under federal law, cannabis is classified as a Schedule I substance under the Controlled Substances Act (CSA) of 1970. Schedule I is the most restrictive category — reserved for substances with a 'high potential for abuse' and 'no currently accepted medical use.' This places cannabis alongside heroin and LSD, and more restrictively regulated than cocaine, methamphetamine, and fentanyl (all Schedule II). At the federal level, cannabis possession, cultivation, distribution, and sale remain crimes — regardless of what any state law says.
Federal vs. State Law — The Conflict
The U.S. Constitution's Supremacy Clause means federal law overrides conflicting state law. However, the federal government cannot force states to criminalize cannabis (the 'anti-commandeering' doctrine). This is why states can legalize cannabis at their level — but federal prosecution always remains technically possible. In 2013, the Cole Memo directed DOJ not to interfere with well-regulated state-legal programs; it was rescinded in 2018 by Attorney General Sessions. Current DOJ policy generally respects state laws, but this is policy, not permanent law — it can change with any administration.
Key Federal Protections & Limitations
The Rohrabacher-Blumenauer Amendment (renewed annually in federal spending bills) prohibits the DOJ from using federal funds to prosecute state-legal medical cannabis patients and providers. Importantly, this protection does NOT extend to recreational programs. The 2018 Farm Bill legalized hemp — defined as cannabis with less than 0.3% THC — and hemp-derived CBD at the federal level, which is why CBD products are federally legal when derived from hemp. Marijuana (above 0.3% THC) remains federally illegal.
Banking & Tax Barriers
Because cannabis is federally illegal, state-legal cannabis businesses cannot access the federal banking system. Most FDIC-insured banks will not serve them, forcing the industry to operate largely in cash — a major security risk. The SAFE Banking Act (passed repeatedly in the House but stalled in the Senate) would fix this. Worse, IRS Tax Code Section 280E prohibits cannabis businesses from deducting standard business expenses, resulting in effective tax rates of 70% or higher. This is why legal cannabis is expensive and why the illicit market persists even in legal states.
Transportation & Interstate Commerce
Transporting cannabis across state lines is a federal crime — even between two states where it is fully legal. This creates 'legal islands': Oregon cannabis cannot legally enter California, and vice versa. The U.S. Postal Service prohibits mailing cannabis. At airports, TSA refers cannabis found at checkpoints to local law enforcement, which typically follows state law in legal states — but flying into a non-legal state carries real legal risk. Driving across state borders with cannabis is a federal offense.
Rescheduling & Reform Efforts
In 2024, the DEA initiated a formal process to reschedule cannabis from Schedule I to Schedule III — which would acknowledge medical use and provide tax relief under 280E. This process is ongoing and subject to regulatory review. Schedule III would still require FDA oversight but would dramatically reshape the industry. Full descheduling (removing cannabis from the CSA entirely) remains the goal of many advocates and would allow true interstate commerce, banking access, and research. Until then, the federal-state tension persists.
What This Means for State Laws
State legalization is real and enforceable at the state level — state police and courts will not prosecute for cannabis that complies with state law. However, federal law creates important boundaries that state legalization cannot override:
- ▸Even in a fully legal state, you can technically face federal prosecution (though rare for compliant individuals).
- ▸Cannabis use can affect federal employment, security clearances, immigration status, green card applications, and firearm purchases (federal Form 4473).
- ▸Traveling with cannabis — especially flying or crossing state lines — carries federal legal risk.
- ▸Federal land (national parks, federal buildings, military bases) enforces federal law even in legal states.
- ▸Public housing residents risk eviction under federal law regardless of state legality.
In short: State law protects you from state prosecution, but not from federal prosecution. In practice, the federal government rarely targets compliant individual users or state-licensed businesses — but the legal risk exists and federal policy can shift with each administration. Always know both your state and federal standing.