Jefferson County IL Jail
County Jail | Jefferson County County — Illinois | Jefferson County Illinois Sheriff's Office
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.
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.
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 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.
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.
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.
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.
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.
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.
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.
- 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.
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Quick Facts
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.