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Mercer County, IL Jail and Prison System

Address: 906 Southwest 3rd Street, Aledo, IL 61231
Phone: 309-582-5020
Fax: 309-574-3103

Mercer County IL Jail is a Medium security level County Jail located in the city of Aledo, Illinois. The facility houses Male Offenders who are convicted for crimes which come under Illinois state and federal laws. The County Jail was opened in 1989 The facility has a capacity of 102 inmates, which is the maximum amount of beds per facility.

The facility is part of Aledo , IL judicial district, which has 0 facilities in total.

Visit Illinois inmate search page for statewide information.

  • 102 Capacity
  • Aledo , IL Judicial District

How Do I Visit an Inmate in Mercer County IL Jail?

Locating an Inmate in Mercer County IL Jail

The best way to locate or get information of any inmate currently incarcerated in Mercer County IL Jail is to contact the County Jail for information on the inmate or visit them online at

Be Approved

Make sure an inmate you are visiting have placed you on their approved visiting list.

Be Prepared to Mercer County IL Jail Visiting Rules

For information on official policy that outlines the regulations and procedures for visiting a Mercer County IL Jail inmate contact the facility directly via 309-582-5020 phone number.

Visitation Days and Hours

Mercer County IL Jail County Jail has visiting hours on Mondays, Tuesdays, Wednesdays, Thursdays, Fridays. For more information on when you can visit an inmate and get directions contact the County Jail directly.

Visiting a Mercer County IL Jail inmate on holidays:

The inmate will be notified as to any changes to the "normal" visitation schedule due to holidays and/or any special commitments.

USP General Visiting Hours
Mon9am - 6pm
Tue9am - 6pm
Wed9am - 6pm
Thu9am - 6pm
Fri9am - 6pm

How to Send a Mail/Care Package to an Inmate?

Inmates can receive letters from their family members and friends, as well as packages from home with prior written approval from the inmate's unit team or authorized staff member at Mercer County IL Jail.

To make sure the mail and package you are sending comes under approved item list and for more clarification contact the County Jail administration at 309-582-5020. Another option for contacting the facility is reaching out via email at

For sending a mail or a care package to an Mercer County IL Jail County Jail inmate you should have the following information on the parcel:

Inmate Mail 1 Inmate Mail 2 Freight and non-USPS parcels Staff Mail

Inmate Name c/o Mercer County Jail 906 SW 3rd St. Aledo, IL 61231