The following outline is provided as an overview of and topical guide to constitutional law:

Constitutional law is a body of law which defines the role, powers, and structure of different entities within a state, namely, the executive, the parliament or legislature, and the judiciary; as well as the basic rights of citizens and, in federal countries such as the United States and Canada, the relationship between the central government and state, provincial, or territorial governments.

Constitutional law can be described as all of the following:

• Australian constitutional law
• Canadian constitutional law
• Constitutional law of the United States

• History of the Constitution of Brazil
• History of the constitution of the United Kingdom
• History of the United States Constitution

• Constitutional crisis