Types of Crimes: Felonies, Misdemeanors, and Infractions

The United States criminal justice system classifies offenses into three primary tiers — felonies, misdemeanors, and infractions — each carrying distinct procedural pathways, punishment ranges, and collateral consequences. This classification structure governs everything from whether a defendant has a constitutional right to a jury trial to whether an offense permanently alters civil rights. Understanding these distinctions is foundational to interpreting any aspect of US criminal law, from arrest through sentencing.

Definition and scope

Criminal offense classification in the United States operates across two parallel frameworks: the federal system, governed primarily by Title 18 of the United States Code, and 50 separate state systems, each with its own statutory definitions. While the specific thresholds vary by jurisdiction, the tripartite structure of felony, misdemeanor, and infraction is recognized across all American legal systems.

Felonies are the most serious category of criminal offense. Under federal law (18 U.S.C. § 3559), felonies are defined as offenses punishable by imprisonment for more than one year. Federal felonies are further subdivided into five classes — Class A through Class E — with Class A felonies carrying a maximum sentence of life imprisonment or death.

Misdemeanors occupy the middle tier. Under 18 U.S.C. § 3559, federal misdemeanors are offenses punishable by imprisonment of one year or less. The federal code recognizes three misdemeanor classes: Class A (6 months to 1 year), Class B (30 days to 6 months), and Class C (5 days to 30 days), plus a petty offense subcategory.

Infractions (sometimes called violations or petty offenses) are the lowest tier. These are typically punishable by fines only, with no possibility of incarceration, and in most jurisdictions do not constitute "crimes" in the full legal sense. The federal definition of "petty offense" under 18 U.S.C. § 19 includes any Class B or C misdemeanor or infraction with a maximum fine of $5,000 or less for individuals.

How it works

Classification is not arbitrary — it determines the procedural rights that attach to a prosecution and the sentencing options available to a court. The elements of a crime must still be proven regardless of classification tier, but the processes that follow differ substantially.

The classification framework operates through the following sequence:

1. Charging decision: A prosecutor reviews the alleged conduct and selects a charge that fits the statutory definition and tier. For felonies, the criminal charges and indictment process typically involves grand jury review at the federal level and in most states, per the Fifth Amendment grand jury clause.
2. Right to counsel attachment: The Sixth Amendment right to appointed counsel, as interpreted in Argersinger v. Hamlin (1972) by the U.S. Supreme Court, attaches whenever actual imprisonment is imposed — meaning even a misdemeanor prosecution that results in incarceration triggers the right established under the Sixth Amendment.
3. Jury trial threshold: Under Baldwin v. New York (1970), the right to a jury trial under the Sixth Amendment applies to offenses carrying a potential sentence exceeding 6 months. Petty offenses and most infractions fall below this threshold.
4. Sentencing: Felony sentences are governed by guidelines at the federal level through the United States Sentencing Commission's Federal Sentencing Guidelines, which use an offense level and criminal history grid to calculate recommended ranges. Criminal sentencing guidelines operate differently at the state level, with some states using presumptive guidelines and others giving judges broader discretion.
5. Collateral consequences: Felony convictions trigger statutory disqualifications including loss of voting rights in most states, federal firearms prohibitions under 18 U.S.C. § 922(g), and deportation exposure for non-citizens. These criminal record consequences do not typically attach to infractions.

Common scenarios

The practical application of these tiers spans a wide range of conduct types. The following examples illustrate how classification operates across offense categories.

Felony examples:
- Robbery under 18 U.S.C. § 2111 carries up to 15 years imprisonment — a Class C felony under the federal classification grid.
- Drug trafficking offenses under 21 U.S.C. § 841 can reach mandatory minimums of 5 to 10 years depending on drug type and quantity, as detailed in federal drug crimes law.
- Violent crimes such as assault resulting in serious bodily injury are classified as Class D felonies at the federal level, carrying up to 10 years.

Misdemeanor examples:
- Simple assault under 18 U.S.C. § 113(a)(5), where no serious bodily injury results, is a Class A misdemeanor carrying up to 1 year.
- First-offense simple drug possession in federal court may be charged as a misdemeanor under 21 U.S.C. § 844, carrying up to 1 year for a first offense.

Infraction examples:
- Traffic violations such as speeding are processed administratively in most states, with no criminal record entry.
- Jaywalking and low-level municipal code violations are typically civil infractions resulting in fixed fines.

Wobbler offenses — offenses that can be charged as either felonies or misdemeanors depending on the facts or the prosecutor's discretion — exist in California and several other states. California Penal Code § 17(b) allows a court to reduce a wobbler to a misdemeanor at sentencing or upon completion of probation, illustrating how classification boundaries are not always rigid at the charging stage.

Decision boundaries

The classification of any specific act depends on four primary variables that courts, prosecutors, and legislatures use to draw jurisdictional lines.

1. Statutory maximum sentence
This is the primary federal test under 18 U.S.C. § 3559. The ceiling set by the legislature — not the sentence actually imposed — determines classification. An offense with a statutory maximum of 366 days is a felony; one with a maximum of 365 days is a misdemeanor.

2. Jurisdiction of prosecution
Federal versus state criminal jurisdiction determines which classification scheme applies. The same physical act (e.g., possessing a firearm after a felony conviction) can be prosecuted federally under 18 U.S.C. § 922(g) as a felony or under state law with varying classification consequences.

3. Aggravating and mitigating factors
Statutory enhancements elevate base offense levels. A simple theft (misdemeanor) becomes felony grand theft once the value of stolen property crosses a statutory threshold — $950 in California under Penal Code § 487, $1,500 in Texas under Texas Penal Code § 31.03. Weapon use, victim characteristics (such as age or official status), and prior criminal history are standard aggravating factors.

4. Felony vs. misdemeanor: key structural differences

Post-conviction options also diverge sharply by tier. Expungement and record sealing eligibility typically excludes serious felonies in most state systems, while misdemeanor records are more frequently eligible for relief after waiting periods are satisfied. Diversion programs and deferred prosecution are available at the misdemeanor and low-level felony tier in most federal districts and many state courts, allowing resolution without a criminal conviction under specified conditions.

The classification tier assigned at charging also shapes the criminal procedure sequence in full — controlling arraignment timelines, bail eligibility frameworks, and appellate rights — making the felony/misdemeanor/infraction distinction one of the most consequential preliminary determinations in any criminal case.

References

• [18 U.S.C. § 3559 — Sentencing Classification of Offenses (U.S. House Office of the Law Revision Counsel)](https://uscode.house.gov/view.xhtml?req