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Jefferson County IL Jail
● Active Medium Male And Female

County Jail  | Jefferson County County — Illinois  | Jefferson County Illinois Sheriff's Office

About This Facility

Jefferson County IL Jail is a medium-security detention facility located in Mt Vernon, Jefferson County County, Illinois. Operating under the Illinois Department of Corrections system and overseen by Sheriff Travis Allen, this facility maintains a capacity of 249 inmates and houses both male and female detainees. The jail serves as the primary detention center for Jefferson County, providing secure custody for individuals awaiting trial and those serving shorter sentences in southern Illinois.

Families of inmates at Jefferson County IL Jail can search criminal records to verify incarceration status, schedule visits during designated hours, send money to inmate commissary accounts, and access arrest records through official channels. The Mt Vernon location provides convenient access for families traveling from throughout Jefferson County and surrounding southern Illinois communities.

Distinguishing Feature

Jefferson County IL Jail stands out among Illinois detention facilities due to its remarkably long operational history dating back to 1820, making it one of the oldest continuously operating jail systems in the state. Located in Mt Vernon, the county seat of Jefferson County, the facility has evolved from its historic origins to meet modern correctional standards while maintaining its commitment to serving the local community. With a capacity of 249 inmates, the jail operates as a medium-security facility capable of housing both male and female detainees under one roof, a configuration that requires specialized staffing and separate housing units. The facility's central location at 911 Casey Avenue in Mt Vernon provides accessibility for families, attorneys, and court officials throughout the Jefferson County judicial district.

Inmate Population

Jefferson County IL Jail houses a diverse inmate population at its Mt Vernon facility, including both pre-trial detainees awaiting court proceedings and sentenced individuals serving terms typically under one year. The medium-security classification accommodates both male and female inmates in separate housing units, with populations ranging from those charged with misdemeanor offenses to individuals facing more serious felony charges. The facility manages detainees arrested throughout Jefferson County on charges including property crimes, drug-related offenses, DUI violations, domestic violence incidents, and probation violations. Special populations within the jail include inmates requiring medical monitoring, those with mental health needs requiring specialized attention, and individuals in protective custody due to safety concerns. The pre-trial population generally comprises the majority of inmates at any given time, reflecting the jail's primary function as a detention center for individuals moving through the Jefferson County court system.

Living Conditions

Living conditions at Jefferson County IL Jail reflect its medium-security classification and dual-gender housing requirements. The Mt Vernon facility utilizes a combination of single cells and multi-inmate housing units, with male and female populations strictly separated in distinct housing pods. Inmates receive three meals daily prepared in the facility kitchen, with accommodations made for medical dietary restrictions and religious observances. Recreation opportunities include access to a controlled outdoor recreation yard on a rotating schedule, allowing inmates physical activity under staff supervision. Medical care is provided through on-site nursing staff and scheduled visits from physicians, with emergency medical situations addressed through coordination with local Mt Vernon hospitals. Mental health services are available for inmates requiring psychological evaluation, counseling, or medication management. The facility maintains a formal grievance process allowing inmates to address concerns about conditions, treatment, or services through written submissions reviewed by jail administration. Personal property is limited, with inmates provided basic hygiene items and the opportunity to purchase additional commissary items. Classification determines housing assignments, with behavior and security considerations factoring into placement decisions at this Jefferson County detention center.

Prison Programs

Jefferson County IL Jail offers programs designed to address the needs of its inmate population while preparing individuals for successful community reintegration. Educational opportunities include GED preparation classes for inmates lacking high school diplomas, providing a foundation for future employment prospects upon release. Substance abuse programming addresses addiction issues common among the Jefferson County jail population, with group sessions focused on recovery principles and relapse prevention strategies. Faith-based programs connect inmates with chaplaincy services and religious volunteers from the Mt Vernon community, offering spiritual support and moral guidance. Cognitive behavioral interventions help inmates identify and modify thinking patterns that contribute to criminal behavior, developing problem-solving and decision-making skills. Re-entry planning services assist inmates nearing release with transitioning back to Jefferson County communities, including connecting individuals with local resources for housing, employment, and continued treatment. Program availability may vary based on inmate classification, length of stay, and individual needs assessments conducted by jail staff.

Production

Work assignments at Jefferson County IL Jail provide inmates with structured activities and opportunities to develop work skills during their incarceration in Mt Vernon. Kitchen detail represents a primary work assignment, with selected inmates assisting in meal preparation, food service, and cleanup under staff supervision. Laundry operations require inmate workers to manage facility clothing, linens, and towels through washing, drying, and distribution processes. Maintenance crews perform routine cleaning and upkeep throughout the facility, maintaining sanitary conditions in housing units, common areas, and administrative spaces. Grounds keeping assignments may be available for trusted inmates performing outdoor maintenance tasks around the Jefferson County facility. Work assignments at this medium-security jail typically earn inmates credits toward commissary privileges or recognition for good behavior rather than traditional wages. Selection for work details considers classification level, behavior history, and remaining sentence length.

History

Jefferson County IL Jail traces its origins to 1820, when the facility was first established to serve the newly organized Jefferson County in southern Illinois. Located in Mt Vernon, the county seat, the jail has undergone numerous transformations throughout its two-century history to meet evolving correctional standards and expanding population needs. The facility's longevity reflects the growth of Jefferson County from a frontier settlement to an established community requiring modern detention services. Significant expansions and renovations over the decades have modernized the infrastructure while maintaining continuous operations at the Casey Avenue location. The current configuration, with a capacity of 249 inmates, represents the culmination of investments in secure housing, programming spaces, and operational systems. Under the oversight of elected sheriffs including current Sheriff Travis Allen, Jefferson County IL Jail has adapted to changes in Illinois correctional policy, judicial procedures, and community expectations. Today, the facility maintains its role as the primary detention center for Jefferson County, balancing public safety concerns with humane treatment standards in the Illinois correctional landscape.

Visitation Info

Visiting hours at Jefferson County IL Jail are scheduled on specific days and times, with families strongly encouraged to contact the facility in advance to confirm current visiting hours and any temporary schedule changes. Visitors must present valid government-issued photo identification such as a driver's license or state ID upon arrival at the Mt Vernon facility. The dress code prohibits revealing clothing, items resembling inmate attire, and clothing with offensive graphics or language that could compromise facility security. Prospective visitors should search public records to confirm an inmate's current housing status before traveling to Jefferson County IL Jail. The registration process requires completing visitor applications and approval by jail administration, with background checks conducted on all potential visitors. Entry screening includes passing through metal detectors and possible search procedures to ensure no contraband enters the facility. Visits typically occur in designated visitation areas with direct or non-contact configurations depending on inmate classification.

Contact an Inmate

Contacting an inmate at Jefferson County IL Jail requires following specific protocols established by the Mt Vernon facility. The correct mailing address format includes the inmate's full legal name, booking number or inmate identification number, followed by Jefferson County IL Jail, 911 Casey Avenue, Mt. Vernon, IL 62864. All incoming mail is subject to inspection for contraband and must come from approved sources. Books and magazines must be sent directly from approved vendors or publishers rather than personal shipments to comply with security policies. You can also look up arrest records to find booking information and inmate identification numbers needed for correspondence. Phone services require families to establish prepaid accounts with the facility's designated provider, enabling inmates to make outgoing calls to approved numbers. Email or video visitation services may be available through third-party vendors contracted by Jefferson County IL Jail.

Send Books & Magazines

Many correctional facilities let families send books and magazines to an inmate — but almost all of them require the items to be brand-new and shipped directly from the retailer. Anything sent secondhand or repackaged at home is usually rejected at the mailroom. Ordering from a retailer that ships direct is the standard way to get reading material in.

Typical requirements (confirm with Jefferson County IL Jail first):
  • Must ship new, directly from the retailer — you can't forward it yourself.
  • Softcover / paperback only at most facilities (hardcovers are commonly banned).
  • No used or third-party marketplace sellers — new copies only.
  • Limits on quantity per package and how many packages may be pending.
  • Address it to the inmate's full committed name and ID number.
  • Use the facility's mailroom address, which can differ from the public address.
Mailing address on file for this facility:
911 Casey Avenue Mt. Vernon, IL 62864
Always include the inmate's full name and ID, and confirm whether books go to a separate mailroom address.
Before you order: book policies vary by facility and change often, and a growing number of jails accept no physical books at all (reading is provided through electronic tablets instead). Confirm Jefferson County IL Jail's current policy by calling 618-244-8015 so your package isn't returned.

As an Amazon Associate, JailData earns from qualifying purchases. These are advertising links; we don't control or guarantee any facility's acceptance of a given item.

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Frequently Asked Questions
What are the visiting hours at Jefferson County IL Jail?
Visiting hours at Jefferson County IL Jail vary by housing unit and day of week — typical medium security facilities allow weekend and evening visits. Visitors must bring valid government-issued photo ID, follow strict dress codes (no revealing clothing, orange or blue apparel), complete visitor registration, and may be subject to screening. Contact Jefferson County IL Jail directly at the facility to confirm current visiting hours, schedule, and any COVID-19 or special restrictions before traveling.
How do I send money to an inmate at Jefferson County IL Jail?
To send money to an inmate at Jefferson County IL Jail, families can use approved third-party services such as JPay, Access Corrections, or GTL (Global Tel Link). Create an online account, search for the inmate by full legal name or inmate ID number, and transfer funds using a credit card, debit card, or bank account. Funds typically post within 1-2 business days and are subject to facility processing fees.
How do I search for an inmate at Jefferson County IL Jail?
To locate an inmate at Jefferson County IL Jail in Mt. Vernon, Illinois, use the Illinois Department of Corrections online inmate locator system at doc.illinois.gov or search public criminal records databases. You may also call Jefferson County IL Jail directly during business hours with the inmate's full legal name and approximate booking date. Alternatively, use the inmate search feature available on this page.
What is the mailing address for Jefferson County IL Jail?
The mailing address for Jefferson County IL Jail is: [Inmate Full Legal Name], Inmate #[ID Number], Jefferson County IL Jail, 911 Casey Avenue, Mt. Vernon, IL 62864. Always include the inmate's complete legal name and assigned inmate ID number on all mail. All correspondence is subject to inspection and may be opened by facility staff per security protocols.
What programs does Jefferson County IL Jail offer?
Programs at Jefferson County IL Jail typically include GED and adult education classes, vocational skills training, substance abuse treatment and counseling, mental health services, and re-entry preparation programming. Program availability may vary based on inmate classification and facility capacity. Contact Jefferson County IL Jail directly or ask your incarcerated family member to inquire about current program enrollment eligibility and participation opportunities.

Quick Facts

Established in 1820, Jefferson County IL Jail is one of Illinois' oldest continuously operating county detention facilities
Population: Unknown inmates, capacity 249 beds
Medium security facility with controlled access, regular inmate monitoring, and structured daily operations
Offers educational programs and re-entry services to support inmate rehabilitation and successful community reintegration

Should I Be Concerned? — Family Guide

Jefferson County IL Jail maintains medium security protocols appropriate for a county detention facility with a 249-bed capacity. The facility's zero staff assault record indicates a stable operational environment. While current occupancy is unknown, the medium security classification provides reasonable assurance of orderly operations. Families should call ahead to confirm visiting procedures, bring valid identification, and adhere to all facility dress codes and conduct rules during visits.

Neighborhood & Getting There

Mt. Vernon, Illinois is located in Jefferson County in the southern portion of the state, approximately 240 miles south of Chicago and 80 miles east of St. Louis, Missouri. The facility sits on Casey Avenue in Mt. Vernon's downtown area with convenient highway access via Interstate 57 and US Route 50. Nearby accommodations and restaurants are available throughout Mt. Vernon, making it accessible for family visits. The region features typical Southern Illinois community infrastructure with local services supporting the county seat.

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