How many people are in prisons in Idaho?
Updated annually
About 9,800 at the end of 2023, the most recent year for which data is available. This number is up 7.9% from 2022 and includes anyone held under state jurisdiction. Prisoners sentenced to one or more years — usually for a felony conviction — make up 98.6% of this group, and the remainder includes people who are serving shorter sentences or awaiting sentencing.
9.83K
prisoners (Dec. 31, 2023)
+7.9%
change in the prison population from 2022 to 2023
In 2023, the Idaho prison population reached its highest level since 2012. Since then, the biggest annual changes were an 8.9% increase in 2019 and an 11.5% decrease in 2020.
The prison population in Idaho peaked in 2023.
Prison population on Dec. 31, 2012-2023
Between 2019 and 2020, the prison population in the US declined sharply, falling 14.6% — a trend that may be visible in some states. The Bureau of Justice Statistics (BJS) attributed some of this to COVID-19, pointing to the deaths of nearly 2,500 state and federal prisoners between March 2020 and February 2021 as well as the 37,700 prisoners across 24 states who were released early from custody.
What is the incarceration rate in Idaho and how does it compare to other states?
In Idaho, there were 490 people per 100,000 residents serving prison sentences. That was 36.1% higher than the US rate of 360 prisoners per 100,000 residents.
In 2023, Idaho had 490 people in prison per 100,000 residents.
Sentenced prisoners under state jurisdiction per 100K residents, 2023
Idaho ranked #5 among states in terms of highest incarceration rates. Across the US, the rate was highest in Mississippi (652 per 100,000) and lowest in Massachusetts (96 per 100,000).
Is the incarceration rate in Idaho increasing or decreasing?
Compared to a decade ago, incarceration rates increased in Idaho by 0.2%. Over the same period, rates decreased in 45 other states and increased in 4.
Over the last decade, incarceration rates in Idaho have increased by 0%.
Sentenced prisoners per 100K residents vs. US rate on Dec. 31, 2014–2023
Are more prisoners in Idaho held in state-run facilities, private prisons, or local jails?
In Idaho, state-run facilities housed 84.9% of people; private prisons, 6.1%; and local jails, 9.0%.
84.9% of prisoners in Idaho were housed in state-run facilities.
As of Dec. 31, 2023
Among states, Montana relied the most on private prisons, which housed 48.7% of its prisoners. Louisiana held 52.7% of its prisoners in local jails, the largest share of any state.
Are prisons in Idaho overcrowded?
Every state operates its own prisons. Forty-seven states housed the majority of prisoners in state-run facilities, and these held more than 99% of the total prison population in 15 states. These facilities are built to house a specific number of people but sometimes, the number of prisoners can exceed maximum capacity.
In 2023, eight states fit this description, including Idaho. Connecticut, Ohio, and Missouri did not report capacity metrics.
In 2023, the state-run prison system in Idaho was operating at 6.5% above maximum capacity.
Prison occupancy vs. maximum capacity
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Methodology
USAFacts standardizes data, in areas such as time and demographics, to make it easier to understand and compare.
The analysis was generated with the help of AI and reviewed by USAFacts for accuracy.
Page sources
USAFacts endeavors to share the most up-to-date information available. We sourced the data on this page directly from government agencies; however, the intervals at which agencies publish updated data vary.
