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Idaho incarcerated population

9,950

People incarcerated under the Idaho Department of Correction on June 30, fiscal year 2026

+0.1% since fiscal year 2025 (9,938); +13.4% since fiscal year 2020 (8,775)

Source: Idaho Department of Correction, Incarcerated Population Report. Data period fiscal year 2026.

Total number of people incarcerated under the Idaho Department of Correction on June 30.

Change and comparison

From fiscal year 2019 (9,027) to fiscal year 2026 (9,950), the change was +10.2%.

The latest figure, fiscal year 2026, is the highest in the series, which begins in fiscal year 2019.

Among 50 states, Idaho ranked 5th highest in 2023 on imprisonment rate from the Bureau of Justice Statistics. Mississippi was highest at 652 per 100,000 and Massachusetts lowest at 96 per 100,000. The headline figure above is in fiscal year 2026; this ranking is in 2023.

Idaho is highest among its neighboring states at 490 per 100,000; Montana is next at 438 per 100,000.

The largest category in population by facility type is Prisons at 7,300; next is County Jails at 1,113.

Historical data

Idaho incarcerated population, 2012 to fiscal year 2026Idaho incarcerated population, 2012 to fiscal year 2026. 2 series. Idaho: 9,027 in fiscal year 2019, 9,950 in fiscal year 2026.05,00010k201520202025IdahoCountIdaho incarcerated population, 2012 to fiscal year 2026Idaho incarcerated population, 2012 to fiscal year 2026. 2 series. Idaho: 9,027 in fiscal year 2019, 9,950 in fiscal year 2026.05,00010k201520202025IdahoPrisonersunder state orfederaljurisdictionCountIdaho incarcerated population, 2012 to fiscal year 2026Idaho incarcerated population, 2012 to fiscal year 2026. 2 series. Idaho: 9,027 in fiscal year 2019, 9,950 in fiscal year 2026.05,00010k201520202025IdahoPrisoners understate or federaljurisdictionCount

Source: Idaho Department of Correction, Incarcerated Population Report.

Data table (18 rows)
PeriodIdaho (count)Prisoners under state or federal jurisdiction (count)
fiscal year 12n/a7,985
fiscal year 13n/a8,242
fiscal year 14n/a8,117
fiscal year 15n/a8,052
fiscal year 16n/a8,252
fiscal year 17n/a8,579
fiscal year 18n/a8,664
fiscal year 19n/a9,437
fiscal year 20n/a8,356
fiscal year 21n/a8,907
fiscal year 22n/a9,110
fiscal year 23n/a9,829
fiscal year 20199,027n/a
fiscal year 20208,775n/a
fiscal year 20239,332n/a
fiscal year 20249,708n/a
fiscal year 20259,938n/a
fiscal year 20269,950n/a

Compared with other states

Every state is compared on imprisonment rate from the Bureau of Justice Statistics: The Bureau of Justice Statistics' own published imprisonment rate: sentenced prisoners per 100,000 U.S. residents of all ages, not the separate rate it also prints per 100,000 residents aged 18 or older. The headline figure above is in fiscal year 2026; this comparison is in 2023.

Per 100,000 residents

  1. Mississippi652
  2. Louisiana617
  3. Arkansas596
  4. Idaho490
  5. Montana438
  6. Wyoming378
  7. United States360
  8. Nevada327
  9. Oregon291
  10. Utah186
  11. Washington181
  12. Rhode Island122
  13. Maine119
  14. Massachusetts96

Source: Bureau of Justice Statistics, National Prisoner Statistics. Data period 2023. Published .

An excerpt; the full table is below.

State2023
1. Mississippi652
2. Louisiana617
3. Arkansas596
4. Oklahoma545
5. Idaho490
6. Texas477
7. Georgia449
8. Arizona448
9. Montana438
10. Kentucky423
Data table (51 rows)
State2023
1. Mississippi652
2. Louisiana617
3. Arkansas596
4. Oklahoma545
5. Idaho490
6. Texas477
7. Georgia449
8. Arizona448
9. Montana438
10. Kentucky423
11. South Dakota405
12. Alabama394
13. Ohio394
14. Missouri385
15. Florida382
16. Wyoming378
United States360
17. Indiana351
18. Wisconsin346
19. Tennessee341
20. Michigan328
21. West Virginia328
22. Nevada327
23. Virginia314
24. Kansas305
25. Pennsylvania300
26. South Carolina299
27. Nebraska295
28. Oregon291
29. Colorado290
30. Delaware275
31. North Carolina275
32. Iowa274
33. Maryland261
34. New Mexico259
35. California246
36. North Dakota240
37. Illinois238
38. Alaska202
39. Utah186
40. Connecticut183
41. Washington181
42. New York167
43. Hawaii165
44. Minnesota152
45. New Hampshire151
46. New Jersey125
47. Vermont124
48. Rhode Island122
49. Maine119
50. Massachusetts96

Population by facility type

People incarcerated under the Idaho Department of Correction on June 30, by type of facility.

Count

  1. Prisons7,300
  2. County Jails1,113
  3. Out of State Beds900
  4. Reentry Centers637

Source: Idaho Department of Correction, Incarcerated Population Report. Data period fiscal year 2026.

Data table (4 rows)
Facility typefiscal year 2026 (count)
Prisons7,300
County Jails1,113
Out of State Beds900
Reentry Centers637

Population by legal status

People incarcerated under the Idaho Department of Correction on June 30, by legal status.

Count

  1. Termer8,252
  2. Rider1,118
  3. Parole Violator580

Source: Idaho Department of Correction, Incarcerated Population Report. Data period fiscal year 2026.

Data table (3 rows)
Legal statusfiscal year 2026 (count)
Termer8,252
Rider1,118
Parole Violator580

Source

Organization
Idaho Department of Correction
Dataset
Incarcerated Population Report
Geography
Idaho, statewide
Time coverage
FY2019-FY2026 (FY2021 and FY2022 have no total population figure; see caveats)
Update frequency
Annual. IDOC publishes the report for a fiscal year after it ends June 30.
Original file
https://www.idoc.idaho.gov/content/document/fy_2026_incarcerated_population_report
License
Public domain. Idaho state government work.
Our copy
Incarcerated Population Report

Caveats

  • This is a point in time count as of June 30 each year, not an average daily population or a count of admissions during the year.
  • The count includes people IDOC holds in county jails and in a contracted out of state facility in Arizona, so it is not a count of people held inside Idaho's own state prisons alone.
  • IDOC's reports also break the incarcerated population down by crime group, age and gender, but those figures print only as percentage labels on a chart image with no adjoining table, so they are not in this dataset.
  • Facility type and legal status are two different breakdowns of the same population, and each one's categories sum to the total incarcerated population for its fiscal year.
  • IDOC's FY2021 and FY2022 reports do not print their fiscal year's total incarcerated population in a table or as a chart value, so neither year carries a total here; the FY2021 report states one inside a narrative sentence, and that figure disagrees with its own tables.

Where sources disagree

  • Total incarcerated population, Idaho, FY2021: the narrative text of IDOC's own FY2021 report publishes 8,515. IDOC's FY2021 report states in a sentence that the population fell 2.9% in the fiscal year, from 8,775 to 8,515. The same report's Facility Type table and its status totals for June 30, 2021 each sum to 8,518, and the FY2022 report restates the facility rows without changing that sum. This dataset carries no total for FY2021, because IDOC prints one only in that sentence and it does not agree with the tables the rest of this dataset is read from.
  • Total incarcerated population, Idaho, FY2023: the Bureau of Justice Statistics, National Prisoner Statistics publishes 9,829. IDOC counts 9,332 people incarcerated on June 30, 2023. The Bureau of Justice Statistics counts 9,829 under Idaho's jurisdiction on December 31, 2023. The two are six months apart in a period when the population was rising, and they count different things: IDOC's figure is who it holds, in state prisons, reentry centers, county jails and a contracted Arizona facility, while the Bureau's is who Idaho is legally responsible for wherever they are held. Both are correct for what each measures.

State comparison:

Organization
Bureau of Justice Statistics
Dataset
National Prisoner Statistics
Geography
Nation and states
Time coverage
2012-2023
Update frequency
Annual
Published
Original file
https://bjs.ojp.gov/library/publications/prisoners-2023-statistical-tables
License
Public domain. U.S. federal government work.
Our copy
National Prisoner Statistics

Caveats

  • A prisoner is counted under whichever state's or the federal government's jurisdiction is legally responsible for them, regardless of the facility where they are actually held, including another jurisdiction's prison, a privately operated facility, or a local jail.
  • Figures are a snapshot on December 31 of the year, not a count of admissions, releases, or an average population over the year.
  • Each annual edition of this report covers two years. Where a later edition gives a different figure than an earlier edition for a year both cover, the later edition's figure is kept, since the Bureau of Justice Statistics revises earlier counts.
  • The District of Columbia does not appear in this dataset. DC felony sentencing has been the Federal Bureau of Prisons' responsibility since December 31, 2001, so no separate DC jurisdiction total is published.
  • A small number of state and year combinations have no published figure and are left out here rather than estimated.
  • This is the rate the Bureau of Justice Statistics itself publishes, using the U.S. Census Bureau's population estimate for January 1 of the following year as the denominator; it is not calculated here.

Cite

Cite this page as Understand Idaho, “Idaho incarcerated population”, https://understandidaho.com/crime/incarceration/, retrieved on the date you read it, and the publisher named above for the figures themselves. The dataset behind it is described in the data catalog.

This page was last updated .