The original Mercer County Jail opened in 1989 and had a total capacity of 30. The recently completed addition houses an additional 72 inmates making the total inmate capacity 102. The jail houses all sentenced and arrested county inmates and Cook County and federal inmates in transit or awaiting trial. The jail is one of the Sheriff's Office's primary functions and is required by the Illinois State Constitution. The current supervisor of the correctional staff is Chief of Corrections Justin Hartman, and he oversees a diverse staff of correctional officers, medical personnel, and specializations, including field training officers. Officers assigned to the jail perform several essential tasks, including the booking of arrested persons, inmate medical screenings, inmate transport, court security and shakedowns, and cell checks. Please feel free to contact us directly if you cannot find what you are looking for on this page.
Bonding fee is $42.00
Inmates are only allowed one visit per day but can have one visit each day. The visitation hours are as described below.
A person who has been released from jail custody within the previous six months will not be allowed to visit an inmate in this facility.
Staff reserves the right to cancel any or all visits due to extenuating circumstances, abuse of visitation, or policy violations during visits. Staff will do everything possible to make sure this does not happen. Please conduct yourself according to policy so as not to lose this privilege.
Please print the names of visitors and the inmate you wish to visit along with the date of birth clearly to be read.
9:00 am to 1:00 pm
2:30 pm to 9:00 pm
All visits must be scheduled through Combined Public Communications. www.inmatesales.com
You may also call 1-877-988-5678
Inmate Sales allows you to provide money for telephone, Remote Visitation, Chirping(Texting) and Tablet features.
All visitors must be at least 18 years of age and present a valid state-issued ID. There is a two-adult maximum per visit, and children are allowed to visit alongside their parent or guardian. All visitors must also adhere to the following dress code:
- Shirt and shoes at all times
- No revealing clothing
- No gang-related clothing
- No hats or other headgear (other than religious)
No food or drinks are allowed inside the visitation room.
****AS OF JULY 5, 2023***** All inmate mail MUST be sent to the following address:
Inmate Name / Inmate Number
c/o Mercer County Jail Illinois
PO BOX 76550
Highland Heights, KY 41076
Mail Legal Mail and Money Orders directly to the Mercer Co Jail
Inmate Name / Inmate Number
Mercer Co Jail
906 SW 3rd Street
Aledo, IL 61231
Access JailATM.com, mail Money Order / Cashier’s check to the inmate at the above address, or deposit cash or credit/debit cards into Kiosk located in the Sheriff's Office visitation lobby.Jail ATM
The Mercer County Sheriff's Office has contracted Jail ATM to handle inmate money deposits. You must register with Jail ATM to use the system. Inmate Name, ID number, and County of incarceration are used to make these deposits. Get this information from the inmate.
Simply click on the Jail ATM Deposits link on the left side of this page to learn more or deposit money.Inmate Bonding
Jail ATM.com handles the bail process
- Simply go to www.JailATM.com
- Create a log-in to pay remote bonds
- You will need the inmate's name
- Choose Mercer County Sheriff's Office
If you need assistance, call customer support at 1-877-810-0914. Bails may also be paid in person at the Mercer County Sheriff's Office in Aledo, IL.DOC Jail Inspection Reports
Click the link below to view the full report.