Attention: LawAtlas has moved. This archived version of LawAtlas contains some datasets pending migration. Visit us at our new location, .

LawAtlas is the central, authoritative place for systematically collecting, measuring and displaying laws.

LawAtlas is a tool designed to help policy-makers, advocates and researchers understand what the laws are on a given topic, know how the laws differ over time and across jurisdictions, and evaluate their impact.

Explore the Law

Access maps, tables and reports.

Choose a topic Choose a topic to query (You will be prompted to log in)


Download data, codebooks and protocols.

Go to Data page

Featured Datasets

Medical Marijuana Laws for Patients

Medical Marijuana Laws for Patients

The U.S. federal government has not endorsed the medical benefits of marijuana, and the Controlled Substances Act of 1970 makes marijuana use illegal on the federal level, classifying it as a Schedule I drug with no currently accepted medical use. Despite the federal ban on medical marijuana, this map explores the 24 jurisdictions that have passed laws explicitly legalizing medical marijuana use. Read more


Naloxone Overdose Prevention Laws

Unintentional drug overdose is now considered to be a leading cause of preventable death in the United States. Administering naloxone hydrochloride ("naloxone") can reverse an opioid overdose and prevent these unintentional deaths. Read more