| State | ||||||||
| Adult Offenders Incarcerated | ||||||||
| Source: Idaho Department of Corrections | ||||||||
| Region 1 | Region 2 | Region 3 | Region 4 | Region 5 | Region 6 | Region 7 | State Total | |
| 1998 | 289 | 132 | 452 | 644 | 419 | 389 | 246 | 2571 |
| 1999 | 400 | 142 | 483 | 789 | 369 | 401 | 262 | 2846 |
| 2000 | 481 | 162 | 507 | 754 | 380 | 420 | 235 | 2939 |
| 2001 | 390 | 132 | 474 | 750 | 434 | 375 | 256 | 2811 |
| 2002 | 238 | 75 | 308 | 512 | 257 | 239 | 145 | 1774 |
| 2003 | 228 | 67 | 280 | 573 | 248 | 251 | 156 | 1803 |
| 2004 | ||||||||