Alternative sentences include the sentences or punishments a judge may give, other than a traditional jail or prison term, or the death penalty. Alternative sentences are often given in combinations of fines, restitution, probation, deferred adjudication, suspended sentences, community service, diversion programs, drug and alcohol treatment programs, house arrest, breathalyzer or ignition interlock device (IID) installation, and teaching or attending classes regarding crime and criminal behavior.

In Montana, alternative sentences are legal options that judges can use to divert individuals from traditional incarceration or the death penalty. These alternatives are designed to address the specific circumstances of the offender and the offense, and can include fines, restitution payments to victims, probation, and deferred adjudication where judgment is postponed. Suspended sentences allow the court to delay serving time under certain conditions. Community service is another alternative that may be ordered, as are diversion programs which typically involve rehabilitation efforts. Drug and alcohol treatment programs may be mandated for substance-related offenses. House arrest, or electronic monitoring, restricts an individual to their home instead of jail. Breathalyzer or ignition interlock device (IID) installation in vehicles is a common requirement for DUI offenders. Educational programs that focus on crime prevention and understanding criminal behavior may also be part of an alternative sentence. These options are considered based on the nature of the crime, the defendant's criminal history, and the goal of promoting rehabilitation and public safety.