St. Clair County, Illinois sentencing data
As of June 30, 2026, according to Illinois Department of Corrections records, 771 people sentenced in St. Clair County were held in Illinois state prisons. Their median sentence is 10 years, about the same as the statewide median of 10 years. 36% are serving 20 years or more, compared with 33% statewide. The most common offense is murder/intent to kill/injure.
Sentences by offense: St. Clair County vs. Illinois
Offenses with 10+ people. Median of the longest sentence from each person's most recent sentencing; life and death sentences not included.
| Offense | People | St. Clair median (yrs) | Illinois median (yrs) |
|---|---|---|---|
| Murder/Intent To Kill/Injure | 114 | 33 | 40 |
| Agg Battery/Discharge Firearm | 75 | 11.5 | 12 |
| Uuw-Felon Poss/Use Firearm Prior | 50 | 5 | 6 |
| Pred Crim Sex Asslaut/Victim <13 | 33 | 12 | 14 |
| Uuw-Felon Poss/Use Weapon/Firearm | 25 | 3 | 4 |
| Murder/Other Forcible Felony | 22 | 35 | 35 |
| Attempt Murder/Intent To Kill/Injure | 18 | 21 | 25 |
| Murder/2Nd Degree/Unreason | 15 | 20 | 20 |
| Agg Discharge Firearm/Occ Veh | 14 | 7 | 7 |
| Agg Domestic Battery/Strangle | 13 | 4 | 4.5 |
| Aggravated Domestic Battery | 12 | 5.5 | 5 |
| Agg Discharge Firearm/Occ Bldg | 11 | 9 | 7 |
Race
| Group | People | Share |
|---|---|---|
| Black | 585 | 76% |
| White | 167 | 22% |
| Hispanic | 12 | 1.6% |
Groups with fewer than 10 people are not shown.
Other Illinois counties
About this data
Source: Illinois Department of Corrections public inmate records. People currently in state prison custody whose longest sentence was imposed in St. Clair County, one record per person, using the longest sentence from their most recent sentencing. Criminal history is not in the data, so differences between counties can reflect prior records as well as sentencing practice.