Search for Inmates at Big Muddy River Correctional Center

Big Muddy River Correctional Center Overview

Big Muddy River Correctional Center is operated by the Illinois Department of Corrections, not the Jefferson County Sheriff. The IDOC describes it as a medium-security adult male facility about one mile south of Ina, at 251 N. Illinois Highway 37. It opened in March 1993 and holds sentenced men in state custody. Its programs include sex offender treatment and a Sexually Dangerous Persons program, which sets it apart from a general-population prison.

Because Big Muddy holds people who have already been sentenced, it is not part of the pretrial county jail count. A person here has moved past arrest and booking into the state prison system. That is why a search for someone at Big Muddy uses the state locator rather than the county roster, and why its visitation and money rules come from IDOC.

Big Muddy River Correctional Center Capacity and Population

State reports give clear figures for Big Muddy. The IDOC April 2026 quarterly report listed the prison at 1,865 operational capacity and 1,784 rated capacity, with a current population of 1,610 and a February 2026 average daily population of 1,597. An earlier IDOC facility page listed a population of 1,495 as of mid-2024. Those figures carry different dates and should be read with their dates rather than treated as conflicts.

The April 2026 report also gave a late-February 2026 demographic breakdown that included 723 White, 676 Black, and 198 Hispanic or Latino residents, among smaller groups. These are state prison figures, not Jefferson County jail demographics.

How to Look Up an Inmate at Big Muddy River Correctional Center

People at Big Muddy are searched in the statewide IDOC Individual in Custody Search, not the county jail app. The IDOC number is the best search key once known, with name and birthdate as alternates. This is the correct tool after sentencing, after transfer to reception and classification, or when a person disappears from the county roster because they were committed to state custody.

1. Open the IDOC Individual in Custody Search.
2. Search by last name, birthdate, or IDOC number.
3. Confirm the parent institution shows Big Muddy River Correctional Center.
4. Open the profile for custody status, sentence, and any release-related dates.

A county booking number or sheriff app inmate ID is not an IDOC number, so do not use one in the state search. For the county side, see the Jefferson County jail inmate records page.

How Big Muddy Differs From the County Jail

The clearest way to avoid the location mix-up is to compare Big Muddy with the Jefferson County jail side by side. They sit in the same county but work in opposite ways, from who runs them to how you search and visit. A person searching the wrong system will not find their family member, even when the person is in custody.

One link between them is the court record. A person sentenced out of a Jefferson County case keeps that case file with the Jefferson County Circuit Clerk, while their custody record moves to IDOC. For release or transfer alerts on a state prisoner, Illinois VINELink can send notifications.

Big Muddy River Correctional Center Address and Contact

The prison is reached through its facility line and the IDOC. Use the facility phone for general questions, and the IDOC locator and facility page for custody and visiting detail.

Visiting Someone at Big Muddy River Correctional Center

Visitation at Big Muddy follows IDOC prison rules, which are stricter than county jail rules. Visitors other than government or legal visitors generally must be on the approved visiting list before they come. Video visits use ICSolutions and require advance sign-up. The video-visit windows IDOC listed for Big Muddy run daily, with morning and late-afternoon blocks, so confirm a slot before relying on it.

The approval step is the main difference from a county jail visit. At the Jefferson County jail, a visitor calls a day ahead and schedules a slot. At Big Muddy, a visitor generally must first be placed on the approved visiting list, which is a separate process handled through IDOC rules. Government and legal visitors are treated differently from family and friends. Because of that approval layer, planning a Big Muddy visit takes more lead time than a county jail visit, and confirming a visitor's status in advance avoids a wasted trip to Ina.

Note: prison visiting lists, approval, and schedules change, so verify a visitor's status with IDOC before traveling to Ina.

Mail, Phone, and Money at Big Muddy River Correctional Center

Mail and money at Big Muddy run on IDOC systems, not the county jail vendors. Mail should include the person's IDOC number near their name. Non-privileged mail may be scanned or photocopied, while privileged legal mail is opened in the person's presence for inspection. Money is sent through state-approved channels, not the jail's JailATM or lobby kiosk. The state money options include JPay, MoneyGram, and Western Union Send2Corrections, along with money orders sent to a JPay lockbox rather than to the prison itself. Each of these differs from how a family sends money to the Jefferson County jail, so do not reuse the county vendor or address for a person held at Big Muddy.

Intake and Classification at Big Muddy River Correctional Center

Big Muddy does not book people off the street the way a county jail does. People arrive after sentencing through the IDOC reception and classification process, which assigns custody level, housing, and programs. Someone arrested in Jefferson County would first pass through the county jail and the courts, then enter state custody only after a prison sentence. At that point the county roster no longer applies and the IDOC record becomes the custody source.

About Big Muddy River Correctional Center

Big Muddy opened in 1993 and has become known within IDOC for its treatment programming, including sex offender treatment and the Sexually Dangerous Persons program. Its population has stayed in the 1,500 to 1,800 range in recent state reports, well within its rated capacity. Because it is a state prison rather than a county jail, its court records stay with the sentencing court while custody is tracked by IDOC. People often reach this facility after a county case ends, including some who pass through the Jefferson County Justice Center first.

The prison's size also explains why its numbers dwarf the local jail count. Big Muddy serves the whole state, so its roughly 1,600 residents have little to do with the number of people arrested in Jefferson County in any given month. A reader comparing the county inmate population should keep the two counts separate. The jail measures local and contract detainees in Mt. Vernon, while Big Muddy measures sentenced men sent here from courts across Illinois. The state quarterly report and the older facility page carry different dates, so each figure should be read with its date rather than blended into a single current count.