Decarceration in the United States involves government policies and community campaigns aimed at reducing the number of people held in custody or custodial supervision. Decarceration, the opposite of incarceration, also entails reducing the rate of imprisonment at the federal, state and municipal level. As of 2019, the US was home to 5% of the global population but 25% of its prisoners. Until the COVID-19 pandemic, the U.S. possessed the world's highest incarceration rate: 655 inmates for every 100,000 people, enough inmates to equal the populations of Philadelphia or Houston. The COVID-19 pandemic has reinvigorated the discussion surrounding decarceration as the spread of the virus poses a threat to the health of those incarcerated in prisons and detention centers where the ability to properly socially distance is limited. As a result of the push for decarceration in the wake of the pandemic, as of 2022, the incarceration rate in the United States declined to 505 per 100,000, resulting in the United States no longer having the highest incarceration rate in the world, but still remaining in the top five.

Electronic monitoring or electronic incarceration (e-carceration) is state use of digital technology to monitor, track and constrain an individual's movements outside of a prison, jail or detention center. Common examples of electronic monitoring of individuals under pre-trial or immigrant detention, house arrest, on probation or parole include: GPS wrist and ankle monitors, cellphones with biometric security systems, ignition interlock devices and automated probation check-in centers or kiosks.