The Tenth Amendment: Protecting State Powers and Individual Rights

The Tenth Amendment clarifies that powers not granted to the federal government, nor forbidden to the states, belong to the states or the people.

By Garret Merkley · Explainer · Jul 30, 2026

Branched from Sovereignty and Supremacy: Understanding Federal vs. State Power in the U.S. Constitution

Quick take

The Tenth Amendment limits the federal government to powers explicitly granted or implied by the Constitution.
It reserves all other powers to the individual states or to the people.
This amendment is a cornerstone of American federalism, balancing power between national and state governments.
It is frequently invoked in debates over state autonomy and individual liberties versus federal authority.

The Tenth Amendment to the U.S. Constitution is the final amendment in the Bill of Rights. It plainly states that any powers not specifically delegated to the federal government by the Constitution, nor prohibited by it to the states, are reserved either to the states respectively, or to the people. This amendment acts as a critical line in the sand, defining the scope of federal power and reinforcing the principle of limited government.

How the Tenth Amendment Defines Federal vs. State Authority

At its core, the Tenth Amendment establishes the "reserved powers doctrine." The federal government possesses only those powers explicitly listed in the Constitution (known as enumerated powers, like coining money or declaring war) and those powers that are implied as necessary to carry out the enumerated ones. Everything else – all other governmental authority – is considered reserved. This means states retain broad authority over matters within their borders, such as education, public health, local law enforcement, and intrastate commerce, provided they do not infringe upon federal powers or individual constitutional rights.

The phrase "or to the people" is also significant. It acknowledges that some powers might not even belong to the state governments, but rather reside directly with individuals. This reinforces the idea of popular sovereignty and suggests that citizens hold ultimate authority, further limiting both federal and state governments to their constitutionally defined roles. It serves as a reminder that governments derive their just powers from the consent of the governed.

The Tenth Amendment is vital for understanding American federalism – the system of government where power is divided between a national government and various state governments. It serves as a constant point of reference in political and legal debates, particularly when federal actions are seen as potentially overstepping their constitutional boundaries. Issues like healthcare mandates, environmental regulations, drug laws, and educational standards often spark discussions about whether the federal government has the authority to act, or if these matters should be left to the states and their citizens to decide. It ensures a diversity of laws and approaches across states, allowing for local solutions to local problems and reflecting varied regional preferences.

Does the Tenth Amendment give states unlimited power?

No, states are not given unlimited power. They are still bound by the U.S. Constitution. For example, the Supremacy Clause (Article VI) dictates that federal law is supreme when there is a conflict with state law, provided the federal law itself is constitutional. States also cannot violate individual rights protected by the Bill of Rights or the 14th Amendment.

What's the difference between "enumerated" and "reserved" powers?

Enumerated powers are those specifically listed for the federal government in the Constitution, primarily in Article I, Section 8 (e.g., regulating interstate commerce, establishing post offices). Reserved powers are all other powers that the Constitution does not grant to the federal government nor deny to the states, which are then "reserved" to the states or the people by the Tenth Amendment.

How does the "Necessary and Proper Clause" relate to the Tenth Amendment?

The Necessary and Proper Clause (Article I, Section 8, Clause 18) allows Congress to make all laws "necessary and proper" for carrying into execution its enumerated powers. This clause has historically been a source of tension with the Tenth Amendment, as it can expand federal power. Courts often balance these two, ensuring federal actions are genuinely tied to an enumerated power and do not overreach into areas clearly reserved for states.