
In the United States, criminal law is enacted by both federal and state governments, with the majority of criminal laws being written and enforced by state governments. This is due to the principle of federalism, which divides governmental power between the federal government and each of the states, and the Tenth Amendment, which grants states the police power to legislate for the health, safety, and welfare of their citizens. The US Congress, formed by the House of Representatives and the Senate, is responsible for enacting federal legislation, including criminal law, and has the authority to override a presidential veto by a two-thirds vote. State laws, on the other hand, are created by bicameral legislatures, consisting of an upper house (Senate) and a lower house (House of Representatives, Assembly, or House of Delegates), and are enforced within their respective borders.
| Characteristics | Values |
|---|---|
| Level of government that writes the majority of criminal laws | State governments |
| Reason for the above | Principle of federalism |
| Who enacts criminal laws | Both federal and state governments |
| Who holds primary responsibility for most criminal legislation | State governments |
| Who creates and enforces criminal laws | State governments |
| Who deals with nationwide impact crimes | Federal government |
| Who deals with local crimes | State governments |
| Who has sole authority to enact legislation | Congress |
| Who has the power to make new laws or change existing laws | Congress |
| Who has the power to enact criminal laws | States (due to the Tenth Amendment) |
| Percentage of criminal laws that are state laws | 90% |
| Who has jurisdiction over federal offenses or crimes that cross state lines | Federal government |
| Who has the power to regulate | Federal government (foreign affairs, commerce, etc.) |
| Who has the power to punish | Congress (for piracies, felonies on the high seas, counterfeiting, and treason) |
| Who has the authority to create law | Federal government (as per Article I, § 8 of the US Constitution) |
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What You'll Learn
- Federal and state governments can enact criminal law
- Federal law regulates issues concerning the entire country
- State governments create and enforce criminal laws within their borders
- Congress is the lawmaking branch of the federal government
- The Senate and House of Representatives form the United States Congress

Federal and state governments can enact criminal law
In the United States, both federal and state governments can enact criminal law. The US system of government is called federalism, which divides governmental power between the federal government and each of the states. This means that the US has one federal legal system and each state has its own legal system.
The US Constitution grants Congress the authority to enact legislation. Congress is made up of the House of Representatives and the Senate, which form the legislative branch of the federal government. All legislative power in the government is vested in Congress, meaning that it is the only part of the government that can make new laws or change existing ones. However, the President may veto bills passed by Congress, although Congress can override this with a two-thirds majority in both the Senate and the House of Representatives.
The Tenth Amendment grants states the police power to legislate for the health, safety, and welfare of their citizens. This means that states have the authority to enact criminal laws, and about 90% of all criminal laws are state laws. Each state has its own set of laws, often compiled into a penal code, which covers a wide range of offences, from theft to murder, as well as traffic violations.
Federal criminal laws are less frequent but deal with crimes that have a nationwide impact, such as drug trafficking, immigration offences, and crimes committed on federal property. Federal laws also regulate issues that cross state lines, such as commerce and transportation. The Supremacy Clause of the Constitution ensures that federal laws take precedence over state laws in cases of conflict.
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Federal law regulates issues concerning the entire country
In the United States, federal law regulates issues that concern the entire country. The US Congress is the law-making branch of the federal government, with the Senate and the House of Representatives forming the US Congress. Congress is one of the three coequal branches of government, with significant powers ascribed to it by the Constitution.
While both the federal and state governments have the authority to enact laws, the federal government's jurisdiction is typically limited to federal offences or crimes that cross state lines. Federal laws deal with crimes that have a nationwide impact, such as drug trafficking, immigration offences, and crimes committed on federal property. The Supremacy Clause of the Constitution ensures that federal laws take precedence over state laws in cases of conflict.
The Tenth Amendment grants states the power to legislate on issues not specifically reserved for the federal government, including criminal law. As a result, about 90% of criminal laws in the US are state laws, encompassing the vast majority of criminal cases handled annually by state courts. Each state has its own set of laws, often compiled into a penal code, which covers a wide range of offences, from theft to murder, as well as traffic violations.
The intricate system of American federalism allows for multiple layers of government, including local governments such as city and county governments, as well as special-purpose districts, all operating under the authority of state law. Federalism protects individual liberty by preventing any one government from having complete jurisdiction over all aspects of public life. It also allows for policy experimentation at the state level without risking the stability of the entire country.
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State governments create and enforce criminal laws within their borders
In the United States, state governments are responsible for creating and enforcing criminal laws within their borders. This is primarily due to the principle of federalism, where both the federal and state governments have the authority to enact laws, but the states hold primary responsibility for most criminal legislation. Federalism, as outlined in the US Constitution, divides governmental power between the federal government and each of the states, preventing a concentration of power in one individual or small group.
State governments create and enforce criminal laws that apply specifically within their borders. Each state has its own set of laws, often compiled into a penal code. These laws cover a wide range of offenses, including theft, murder, and traffic violations. The state legislative branch, typically consisting of a bicameral legislature with an upper and lower house, is responsible for creating these laws.
The Tenth Amendment to the US Constitution grants states the police power to legislate for the health, safety, and welfare of their citizens. This amendment is a key reason why state governments are the primary source of criminal laws in the US. It ensures that powers not delegated to the federal government are reserved for the states and the people. As a result, about 90% of all criminal laws in the US are state laws, and state courts handle the vast majority of criminal cases annually.
While the federal government also enacts criminal laws, its jurisdiction is generally limited to federal offenses or crimes that cross state lines. Federal criminal laws address issues that impact the entire country rather than individual states or localities. They typically deal with crimes that have a nationwide impact, such as drug trafficking, immigration offenses, and crimes committed on federal property. Federal laws also regulate commerce and economic activity that crosses state lines, ensuring a consistent legal framework across the nation.
The intricate system of American federalism allows for multiple layers of government, including local governments such as city and county governments, which operate under the authority of state law. This decentralized structure ensures that state governments play a pivotal role in creating and enforcing criminal laws within their respective borders, tailoring their legislation to the specific needs and circumstances of their citizens.
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Congress is the lawmaking branch of the federal government
Congress, as one of the three coequal branches of government, is ascribed significant powers by the Constitution. All legislative power in the government is vested in Congress, meaning that it is the only part of the government that can make new laws or change existing ones. While the President may veto bills passed by Congress, Congress can override this veto with a two-thirds majority vote in both the Senate and the House of Representatives.
The legislative process begins with the introduction of a bill to Congress. Anyone can write a bill, but only members of Congress can introduce legislation. Bills can be proposed by sitting members of the Senate or House of Representatives, or during their election campaigns. They can also be petitioned by citizens or groups who recommend a new or amended law to a member of Congress. Once introduced, a bill is assigned to a committee that researches, discusses, and makes changes to it.
Congress also has the power to mandate spending on specific items, known as "earmarks," which specify funds for particular projects rather than government agencies. It holds hearings and investigations, and conducts oversight of the executive branch through committees in both the House and the Senate.
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The Senate and House of Representatives form the United States Congress
In the United States, the legislative branch of the government, which is made up of the Senate and the House of Representatives, writes criminal laws. This legislative branch operates at both the federal and state levels. The federal government enacts criminal laws that apply to the entire country, while state governments enact criminal laws that apply only within their respective states.
The United States' system of government is called federalism, which divides governmental power between the federal government and each of the states. This prevents a concentration of power in one individual or small group of individuals. The federal government derives its authority to create law from Article I, § 8, which discusses federal Congress's exclusive or delegated powers. The Constitution specifically authorises Congress to punish piracies and felonies on the high seas, counterfeiting, and treason.
Case precedent has also expanded the federal government's power to enact criminal laws based on the commerce clause and the necessary and proper clause. However, the federal government's power is limited, with the Tenth Amendment vesting in states the police power to provide for the health, safety, and welfare of state citizens. As a result, the majority of criminal laws are written at the state level, with approximately 90% of all criminal laws being state laws. State governments have the primary responsibility for creating and enforcing criminal laws, with the power to regulate for the health, safety, and welfare of citizens pursuant to their police power.
The Senate and the House of Representatives, which form the legislative branch of the federal government, are responsible for proposing and passing bills, which are proposals for new laws or changes to existing laws. A bill can be proposed by a sitting member of the Senate or House of Representatives or be suggested during their election campaign. Bills can also be petitioned by citizens or groups who recommend a new or amended law to a member of Congress. Once a bill is introduced, it is assigned to a committee that researches, discusses, and makes changes to it. This process is how the Senate and House of Representatives, as part of the legislative branch, contribute to the creation of criminal laws in the United States.
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Frequently asked questions
The power to enact criminal law in the United States belongs almost exclusively to the states. This is due to the Tenth Amendment, which grants states the police power to legislate for the health, safety, and welfare of their citizens. It is estimated that about 90% of all criminal laws are state laws.
While the federal government also enacts criminal laws, its jurisdiction is typically limited to federal offenses or crimes that cross state lines. Federal criminal laws come into play less frequently than state laws. Federal laws regulate issues that concern the entire country, such as foreign affairs and commerce that crosses state lines.
The first step in the legislative process is the introduction of a bill to Congress. Anyone can write it, but only members of Congress can introduce legislation. A bill is a proposal for a new law or a change to an existing law. Once a bill is introduced, it is assigned to a committee whose members will research, discuss, and make changes to the bill. If the bill passes, the President may choose to veto it, but Congress can vote to override the veto.











































