Vehicular manslaughter is a criminal offense defined as the unintentional killing (homicide) of another person as a result of criminal negligence or recklessness while operating a motor vehicle—often while the operator is intoxicated by alcohol or drugs, engaged in a high risk activity such as street racing, or committing a misdemeanor or infraction offense (speeding) with ordinary negligence.

Vehicular manslaughter is usually a felony offense and often includes significant jail or prison time as potential punishment. Vehicular manslaughter laws vary from state to state and are generally located in a state’s statutes—often in the penal or criminal code.

In Oregon, vehicular manslaughter is referred to as 'Manslaughter in the Second Degree' when it involves the operation of a vehicle, and it is codified under ORS 163.125. This statute states that a person commits the crime of manslaughter in the second degree if they recklessly cause the death of another person or if they intentionally cause or aid another person to commit suicide. The offense is classified as a Measure 11 crime and is a Class B felony, which carries a mandatory minimum sentence of 75 months in prison without the possibility of early release or parole. Additionally, if a person is under the influence of intoxicants and causes the death of another, they may be charged with 'Manslaughter in the First Degree' under ORS 163.118, which is a Class A felony with even harsher penalties, including a longer mandatory minimum prison sentence. The specific circumstances of the incident, such as intoxication, racing, or committing traffic infractions, can influence the severity of the charges and the penalties imposed.