State law refers to the law of a federated state, as distinguished from the law of the federation of which it is a part. It is used when the constituent components of a federation are themselves called states. Federations made up of provinces, cantons, or other units use analogous terms like provincial law or cantonal law.

State law may refer to:

• State law (Australia)
• State law (Brazil)
• State law (Germany)
• State law (India)
• State law (Mexico)
• State law (Nigeria)
• State law (United States)
• State law (Venezuela)