“Due process” is the Constitution’s promise that the government has to play fair before it punishes you or takes something away from you. It is one of the oldest ideas in American law, traced back to the Magna Carta of 1215, and it comes up whenever someone is arrested, deported, fired from a public job or cut off from benefits.
Where it comes from
The phrase appears twice in the Constitution:
- The Fifth Amendment (1791) says no person shall “be deprived of life, liberty, or property, without due process of law.” It limits the federal government.
- The Fourteenth Amendment (1868) applies the same words to the states. See what is the 14th Amendment.
Both say “person,” not “citizen.” Due process protects everyone in the United States, including non-citizens and people without legal status.
Courts read the clause in two ways: procedural due process, about how the government acts, and substantive due process, about whether it can act at all.
Procedural due process: fair procedures
At its core, procedural due process means notice (being told what the government plans to do and why) and a meaningful opportunity to be heard (a chance to tell your side to a neutral decision-maker) before the government takes away a protected interest.
What counts as “life, liberty or property” is broader than it sounds. Liberty includes freedom from jail and physical restraint. Property includes not just land and money but some legal entitlements, such as public benefits you qualify for, a public-school education, a professional license, or a government job that can only be ended for cause.
How much process is due depends on the stakes. In Mathews v. Eldridge (1976), the Supreme Court set a three-part balancing test that courts still use:
- the private interest affected, such as income, housing or freedom;
- the risk of a wrong decision under current procedures, and how much extra safeguards would help;
- the government’s interest, including the cost and burden of more process.
That test produces very different answers. In Goldberg v. Kelly (1970), the Court held that welfare recipients are entitled to a hearing before their benefits are cut off, because losing subsistence income can be catastrophic. In Mathews itself, it held that Social Security disability benefits could be stopped first and reviewed afterward. These cases are why benefit programs such as SNAP and Medicaid must send written notices and offer a fair hearing; see Medicaid work requirements explained for a current example.
Due process in criminal cases
The criminal process is where due process is strongest. Many of its guarantees come from specific amendments that the Supreme Court applied to the states through the Fourteenth Amendment’s Due Process Clause:
- the right to a lawyer, including a free one if you cannot afford it, in serious cases (Gideon v. Wainwright, 1963);
- the prosecution must prove guilt beyond a reasonable doubt (In re Winship, 1970);
- prosecutors must hand over evidence favorable to the defense (Brady v. Maryland, 1963);
- criminal laws must be clear enough for ordinary people to understand what is forbidden, or they are “void for vagueness”;
- a fair trial before an impartial judge and jury.
Substantive due process: rights the government cannot take
The more controversial reading is that “liberty” protects certain fundamental rights from government interference no matter how fair the procedures. The Court has used this idea to protect rights not listed in the Constitution, including:
- parents’ right to direct their children’s upbringing and education (Meyer v. Nebraska, 1923; Pierce v. Society of Sisters, 1925);
- married couples’ right to use contraception (Griswold v. Connecticut, 1965);
- the right to marry, including across racial lines (Loving v. Virginia, 1967) and for same-sex couples (Obergefell v. Hodges, 2015);
- private, consensual sexual relationships between adults (Lawrence v. Texas, 2003).
Critics across the political spectrum have long objected that the doctrine lets judges decide which unlisted rights deserve protection. In the early 1900s the Court used it to strike down economic regulation such as maximum-hours laws (Lochner v. New York, 1905), an approach it abandoned in 1937.
The current test, from Washington v. Glucksberg (1997), asks whether a claimed right is “deeply rooted in this Nation’s history and tradition.” In Dobbs v. Jackson Women’s Health Organization (2022), the Court applied that test to hold that there is no constitutional right to abortion, overruling Roe v. Wade. The majority said its ruling did not cast doubt on other precedents; Justice Thomas, in a concurrence, wrote that the Court should reconsider all of its substantive due process decisions. Whether other rights are at risk is one of the live questions in constitutional law.
Due process and immigration
Non-citizens in the United States are “persons” and are entitled to due process, but how much process depends on their situation. People who have lived here for some time generally get a hearing before an immigration judge before they can be removed. People caught at or near the border, or who arrived recently, can be put in faster “expedited removal” with far fewer protections, and the Court held in Department of Homeland Security v. Thuraissigiam (2020) that they have limited rights to challenge that in court.
Due process was at the center of 2025 disputes over the government’s use of the Alien Enemies Act of 1798 to deport Venezuelan men it accused of gang membership. In Trump v. J.G.G. (April 2025), the Supreme Court said the men were entitled to notice and an opportunity to challenge their removal in court. In A.A.R.P. v. Trump (May 2025), it held that notice given roughly 24 hours before removal, without information on how to contest it, was not enough. The case of Kilmar Abrego Garcia, deported to El Salvador by what the government admitted was an administrative error, led the Court to require the government to “facilitate” his return. These cases turned on procedure, not on whether the men could ultimately be deported.
What due process does not require
- It does not apply to private actors. A private employer, landlord or social media company is not bound by the Due Process Clause, though laws and contracts may impose similar duties.
- It does not guarantee a particular outcome, only a fair process. You can lose after a fair hearing.
- It does not always require a full trial. A written notice and a chance to respond can be enough when the stakes are lower.
- It does not cover purely general policy changes. When a legislature changes a rule for everyone, such as lowering a benefit amount, the political process is the protection; due process applies when the government acts against particular people.
If you think your due process rights were violated
Read any notice you receive carefully and note the deadlines. Ask for the hearing or appeal the notice describes, in writing if you can, and ask whether benefits can continue while you wait. Free legal aid organizations handle many benefits, housing and immigration cases. In criminal cases, raise the issue with your lawyer; you have the right to one.