The Marion County Inmate Population
Marion County sits in south central Illinois, with Salem as its county seat and roughly 36,000 residents. The local inmate population is small next to a big-city jail, but it is closely watched. Two kinds of custody make up most of the count. The first is the Marion County Jail in Salem, which holds people who are arrested and waiting for court, along with some who serve short local sentences. The second is Centralia Correctional Center, a state prison inside the county that holds sentenced adult men from across Illinois.
The Illinois Department of Corrections inspects the jail each year and reports its capacity and head count. On the May 21, 2024 inspection, the jail held 59 people against a rated capacity of 116. The county sheriff reports a monthly jail count to the county board, and those minutes show the number rising and falling through the year. A large share of the jail count is made up of federal detainees held under an agreement, a detail that sets Marion County apart from many similar-size counties.
The county homepage publishes county facts and a department directory that points to the sheriff and the courts. The Marion County homepage is a good first stop for verifying the offices behind these numbers. The screenshot below shows the county site as inspected for this resource.
From that homepage a reader can reach the sheriff's office, the circuit clerk, and the state's attorney, which are the three offices that drive most of the Marion County inmate population data.
Marion County Inmate Population Statistics
The clearest official numbers come from the state jail inspection and the IDOC facility pages. The figures below are sourced and dated. Marion County does not publish an average daily population or an annual booking total in official sources, so those rows are left out rather than guessed.
| Measure | Figure | Source / Year |
|---|---|---|
| Inspected jail bed capacity | 116 (100 male, 16 female) | IDOC jail inspection, May 21, 2024 |
| Jail beds, directory figure | 130 | Illinois Sheriffs' Association profile |
| Inspection-day jail count | 59 (54 male, 5 female) | IDOC jail inspection, May 21, 2024 |
| Detention rooms | 44 rooms, plus two dorm rooms | IDOC jail inspection, 2024 |
| Centralia state prison capacity | 1,520 | IDOC Centralia facility page |
| Centralia state prison count | 1,122 | IDOC Centralia page, June 30, 2024 |
Read the jail rows and the prison rows as two separate groups. The county jail count of 59 is a local pretrial and short-sentence figure. The Centralia count of 1,122 is a sentenced state-prison figure and should not be added to the jail total unless you mean every person held inside the county.
Marion County Inmate Population Trends
The county sheriff reports a jail head count to the board most months, and an older state survey gives a starting point. The point-in-time counts below come from county board minutes and the IDOC inspection. They are snapshots, not yearly averages, so treat them as single-day readings. Even so, the pattern is clear: the jail tends to run well under its 116-bed capacity, and federal detainees often make up a third or more of the people inside.
| Date | Jail Count | Notes / Source |
|---|---|---|
| Dec 31, 2013 | 88 | Prison Policy Initiative correctional table |
| Apr 12, 2022 | 106 (28 federal) | County board minutes |
| Feb 28, 2023 | 82 (24 federal) | County board minutes |
| Mar 26, 2024 | 51 (32 federal) | County board minutes |
| May 21, 2024 | 59 (54 male, 5 female) | IDOC jail inspection |
| Jan 28, 2025 | 84 (38 federal) | County board minutes |
| Dec 16, 2025 | 72 (36 federal) | County board minutes |
| Mar 24, 2026 | 56 | County board minutes |
The swing from 51 to 84 inside a single year shows how fast a small jail count can move. A few arrests, a batch of federal transfers, or a round of sentencings can change the number quickly. Booking volume is higher than these snapshots suggest, because the count is a single day, not a running total. One late-2025 report noted 128 people booked into the jail across the month even though the daily count stayed near 72.
Note: County board minutes report a single-day jail count, so two readings days apart can differ sharply without meaning a real trend has formed.
Who Makes Up the Marion County Inmate Population
The inmate population breaks down by where each person stands in the legal process and by which agency holds them. The county jail mixes several groups under one roof. Some are waiting for a first court date. Others are held on a hold or warrant. A steady block is held for the federal government.
- Pretrial detainees make up most of the local jail count, held while their Marion County cases move through court.
- Sentenced state prisoners are not in the jail; once sentenced to prison they move to IDOC custody, such as Centralia Correctional Center.
- Male and female detainees are both held, with the May 2024 inspection showing 54 men and 5 women.
- Federal detainees appear often in the board counts, for example 38 of 84 in January 2025; official sources do not name the contracting agency.
A note on federal detainees: County board minutes repeatedly show federal inmates in the Marion County Jail, but the records reviewed do not confirm the agency or call them ICE detainees. Treat the federal share as a federal hold unless an official source names the agency.
Marion County Jail Capacity and Bed Use
The jail was built in 2002 and inspected at 116 beds, split into 100 male and 16 female beds. A separate Illinois Sheriffs' Association directory lists 130 jail beds, so the two figures come from two sources and should be cited that way. The building has 44 detention rooms plus two dormitory-style rooms that hold from 2 to 14 people each. No renovation is recorded in the 2024 inspection.
On the day of the 2024 inspection the jail was well under capacity, with 59 people in a 116-bed building. Board counts through 2024 and 2025 stayed below the rated number too, peaking near 84. No overcrowding lawsuit, consent decree, or new-jail construction plan was found in official sources for Marion County. The pressure point is less about raw beds and more about the federal hold population, which can lift the count without any change in local arrests.
The Illinois Sheriffs' Association profile lays out the jail's bed count, staff names, and directions in one place. That profile is a useful cross-check on the state inspection figures.
Reading the inspection report and the association profile together gives a fuller picture of the Marion County Jail than either source alone.
Laws Governing the Marion County Inmate Population
Several Illinois laws make jail and inmate information public and set how the jail must run. The Freedom of Information Act opens most records, a separate arrest-report rule controls booking data and photos, and the corrections code gives the state power to inspect every county jail. These rules are why a roster and an inspection report exist at all.
Key Statutes:
Illinois Code § 5 ILCS 140/3 - The state Freedom of Information Act makes non-exempt public records open for inspection and copying, with a response due in five business days.
Illinois Code § 5 ILCS 140/2.15 - Arrest-report data, including name, age, charges, and a booking photo when available, must be furnished within 72 hours unless a withholding rule applies.
Illinois Code § 730 ILCS 5/3-15-2 - The corrections code lets IDOC set county jail standards and inspect each jail for compliance.
The inspection itself is run by the IDOC Jail and Detention Standards Unit, which checks every county jail each year under the corrections code. Its goal is to keep practices safe for the public, staff, and detainees. The 2024 Marion County report is a public document, and the county is encouraged to make it available for review.
Marion County and the State Prison Population
When a person is sentenced to prison in Marion County Circuit Court, they leave the county jail and enter the Illinois Department of Corrections. IDOC then classifies each person and assigns an institution. The assignment may or may not be Centralia, since classification depends on security level and program needs, not on where the case was tried.
Centralia Correctional Center is the state prison physically inside the county, at 9330 Shattuc Road in Centralia. It is a medium-security prison for adult men that opened in October 1980, with an operational capacity of 1,520 and a population of 1,122 as of June 30, 2024. People held there are searched through the IDOC inmate locator, not the county jail roster. The two systems do not share a search box.
How to Search the Marion County Inmate Population
The first stop for a current inmate is the official Marion County inmate inquiry at the sheriff's roster site. It searches the local jail by name. The official Marion County inmate inquiry is hosted at jail.marionso.com, and a public search index shows fields for first name, last name, and an option to include archived records. If the page will not load or the person is not listed, the phone and records-request channels below take over.
The roster page handles current jail custody only, so a sentenced or transferred person will not appear there. Use these steps to run a clean search.
- Open the inmate inquiry at jail.marionso.com.
- Type the person's last name, and add a first name if the name is common.
- Check the "Include Archive Records in Search" box if you are looking for an older or released booking.
- Open a matching result and read the name, booking date, and any custody status shown.
- If nothing matches, call the jail or switch to the state and federal locators below.
Note: A very recent arrest may not appear online right away, so call the Sheriff's Office at (618) 548-2141 to confirm a brand-new booking.
Current Inmate Lookup in Marion County
The live county roster is the tool for people held in the jail right now. Marion County does not publish how often the roster refreshes, so a result is a snapshot that should be confirmed by phone for anything time-sensitive. The portal exposes a short set of search fields, captured below from the public search index. Direct access to the page returned a block during research, so the field list is partial and honest about that.
| Field Label | Type | Required | Notes |
|---|---|---|---|
| First Name | Text | Not published | Narrows the inquiry by given name. |
| Last Name | Text | Not published | Main search field for the roster. |
| Include Archive Records | Checkbox | Optional | Expands the search to older bookings; date range not published. |
Start broad with a last name, then add a first name only if you get too many hits. The archive checkbox is the key to finding a booking that has already dropped from the default current view.
Past and Released Inmate Records
Finding a released or past inmate works a little differently. The roster's archive option may surface an older booking, but the coverage period is not published, so it can miss records. When the archive search comes up empty, a written public-records request to the sheriff is the reliable route. Illinois FOIA lets you ask for booking records, arrest reports, and custody timing in writing, and the office must respond within five business days unless an extension applies.
Sentenced people are a separate case. Once a Marion County defendant is sent to prison, their record lives in the IDOC locator, which keeps admission and release dates for current and former prisoners. A name that has vanished from the county roster has often simply moved to the state system.
What a Marion County Inmate Record Shows
Because the county inquiry page could not be fully inspected, the exact profile fields are not confirmed. The table below lists the record categories to expect on a typical county jail profile and notes which are verified. Do not assume the roster shows a mugshot, bond, or housing unit until a live profile confirms it.
| Field | What It Shows |
|---|---|
| Name | Full name searched by last and first name; confirmed search field. |
| Booking Date | When intake happened; common on county rosters, not yet verified here. |
| Charges | Arrest or booking charge text, which can differ from filed court charges. |
| Bond / Custody Status | Whether the person is held or released; Illinois now centers on release conditions. |
| Housing / Agency | Possible housing unit or holding agency, including a federal hold. |
| Booking Photo | May or may not appear on the public profile; not confirmed for this roster. |
For deeper detail on each field and a full walkthrough of the roster, the Marion County jail inmate records page goes field by field. A few quick definitions help when reading any custody record.
- Pretrial detainee
- A person held before trial while their case is open, not yet convicted.
- Hold or detainer
- A request from another agency that can keep a person in custody even when their local case allows release.
- IDOC
- The Illinois Department of Corrections, the state prison system for sentenced felons.
County Jail vs. State Prison: Where to Look
The single biggest mistake in an inmate search is looking in the wrong system. The county jail and the state prison are run by different agencies and have separate locators. The table below shows which slice of the inmate population each one covers.
| County Jail | State Prison (DOC) | |
|---|---|---|
| Who Is Held | Pretrial and short sentences | Sentenced felons |
| Run By | Marion County Sheriff's Office | Illinois Department of Corrections (IDOC) |
| Where to Look | County jail roster at jail.marionso.com | IDOC Individual in Custody Search |
| Stays Listed | While in local custody; archive option for older bookings | Through admission, release, and parole dates |
If you are unsure where a person stands, start with the county roster. A pretrial detainee belongs there. If the case has reached a prison sentence, switch to the state locator instead.
State and Federal Inmate Search
Beyond the county jail, three more locators cover the rest of the inmate population. Each one is run by a different government and answers a different question about custody.
- State prisoners: the IDOC Individual in Custody Search covers people sentenced to Illinois prison, searchable by last name, IDOC number, or birthdate.
- Federal inmates: the Federal Bureau of Prisons locator covers federal prisoners held from 1982 to today.
- Immigration custody: the ICE Online Detainee Locator covers people in immigration custody.
- Notifications: Illinois VINELink lets you register for free custody and court alerts.
The same person can move between systems over time, from the county jail to a state prison or a federal facility. When a search fails in one locator, the next one often holds the answer.
Marion County Detention Facilities
Two facilities hold the people counted in this resource, and each one serves a different role. The county jail handles local custody, while the state prison holds sentenced men from across Illinois. Each facility has its own page with contact details and a how-to-look-up block.
- Marion County Jail - the local jail in Salem run by the sheriff, holding pretrial detainees, short local sentences, and reported federal detainees.
- Centralia Correctional Center - an IDOC medium-security state prison for sentenced adult men, searched through the state locator.
One name often trips up searchers: FCI Marion is a federal prison in Williamson County, not Marion County, so use the federal locator for it and the county roster only for the Salem jail.
Marion County Inmate Population FAQ
How big is the Marion County inmate population?
The county jail held 59 people on the May 21, 2024 state inspection, against a 116-bed capacity. Board counts through 2024 and 2025 ranged from about 51 to 84 on a given day. Separately, Centralia Correctional Center held 1,122 sentenced state prisoners as of June 30, 2024. The jail and prison figures are counted apart from each other.
How do I search the Marion County inmate population?
Start at the official inmate inquiry at jail.marionso.com and search by last name. Check the archive box for older bookings. If a person is sentenced, use the IDOC Individual in Custody Search instead. For a federal or immigration hold, use the BOP or ICE locators. Call the Sheriff's Office at (618) 548-2141 when an online search comes up empty.
Can I look up a released or past inmate?
Sometimes. The county roster has an option to include archived records, but the coverage period is not published. When that fails, file a written FOIA request with the sheriff for the booking record. A person sentenced to prison will show in the IDOC locator, which keeps admission and release dates.
Why are federal detainees in the county jail?
County board minutes show the Marion County Jail holding federal detainees most months, sometimes a third or more of the total count. The records reviewed do not name the federal agency or the contract terms. The figure should be read as a federal hold, not automatically as ICE custody.