The Rock County Inmate Population
The Rock County inmate population is centered on the Rock County Jail, the sheriff-operated adult detention facility in Janesville. The county describes the jail as the place for sentenced and unsentenced male and female inmates, with operations governed by Wisconsin statutes, DOC administrative code, and constitutional rules. The jail also may hold people for numerous agencies under the same jail rules, so a person in Rock County custody is not always held on a purely local charge.
Official local context comes from the Rock County Sheriff's Office under Sheriff Curt Fell, the sheriff's records request page, and the county's VINELink information page. Those Rock County sources matter because the jail population, custody status, record release, and notification tools are split across different official channels.
Rock County also has the Rock County Youth Services Center, a secure juvenile detention facility for youth ordered through the Rock County Juvenile Court System. That facility is part of the local detention map, but it is not an adult jail roster source. For adults, the most important split is local jail custody versus state prison custody. People awaiting trial, serving short county sentences, or held on local warrants are handled through sheriff and court channels. People sentenced to Wisconsin prison are searched through the Wisconsin DOC Inmate and Offender Search.
Rock County Inmate Population Statistics
Rock County publishes several useful population measures through official sheriff and state sources. The sheriff's employment facts identify a 515-inmate jail capacity and a 200,000+ square-foot sheriff and jail complex. The Rock County Jail 2024 PREA Annual Review gives a local custody snapshot and average daily population. The Wisconsin DOC Office of Detention Facilities annual report adds adult jail admissions and juvenile detention admissions.
| Measure | Figure | Source / Year |
|---|---|---|
| Rock County Jail stated capacity | 515 inmates | Sheriff employment facts, reviewed July 3, 2026 |
| Total inmates on Dec. 31, 2024 | 354 | Rock County Jail 2024 PREA Annual Review |
| Average daily population in 2024 | 325 | Rock County Jail 2024 PREA Annual Review |
| Adult county jail admissions in 2025 | 6,195 | Wisconsin DOC ODF 2025 Annual Report |
| Rock secure juvenile detention admissions in 2025 | 74 | Wisconsin DOC ODF 2025 Annual Report |
Rock County Inmate Population Trends
Adult jail admissions in Rock County fell sharply during 2020, then rose in most later years. The state ODF report lists 5,704 adult jail admissions in 2018, 2,739 in 2020, 4,500 in 2024, and 6,195 in 2025. That 2025 figure was a 37.7% increase over 2024. The same state report says Wisconsin county jail ADP reached 11,718 in 2025 after a statewide drop in 2020 and a multi-year rebound.
| Year | Adult Jail Admissions | Notes |
|---|---|---|
| 2018 | 5,704 | ODF Rock County row. |
| 2020 | 2,739 | COVID-era decrease. |
| 2022 | 4,111 | Continued rebound. |
| 2024 | 4,500 | Slight decrease from 2023. |
| 2025 | 6,195 | 37.7% increase from 2024. |
Juvenile detention moved in the other direction in the most recent state table. Rock secure juvenile detention admissions were 106 in 2024 and 74 in 2025, a 30.2% decrease. Adult jail numbers and juvenile detention numbers should not be merged because they describe different legal systems, different facilities, and different access rules.
Who Is Counted in Rock County Custody
The strongest local adult demographic data located for Rock County is the 2024 PREA review. It reported 309 male inmates and 45 female inmates on Dec. 31, 2024. It also reported a 2024 average daily population of 284 males and 41 females. The official sources reviewed did not publish a local adult jail breakdown by race, age, pretrial status, felony level, misdemeanor level, average length of stay, or outside-agency hold type.
- Adult jail custody - Rock County Jail holds sentenced and unsentenced male and female inmates.
- Juvenile secure detention - Youth Services Center custody is tied to juvenile court orders and is not an adult roster search.
- Sentenced prison custody - Wisconsin DOC handles people sentenced to state prison after transfer from local custody.
- Federal or immigration custody - BOP, ICE, federal court, or the holding jail must be checked based on the case.
Rock County Jail Capacity
Rock County's stated adult jail capacity is 515 inmates. The 2024 PREA average daily population of 325 and the Dec. 31, 2024 snapshot of 354 were both below that stated capacity. No official consent decree, current overcrowding order, or active jail-construction project was located in the official-source research. Capacity still matters for the Rock County inmate population because admissions can rise while a single-day head count remains below the rated bed count.
The state ODF system is the broader reporting framework. Wisconsin DOC collects local detention data, inspects facilities, tracks jail standards, and reports statewide admissions, average daily population, deaths in custody, secure juvenile detention data, and related trends. Rock County readers should treat a jail head count, an admissions count, and an average daily population as different measures.
Laws for Rock County Jail Records
Wisconsin law explains why Rock County jail data exists and why access may still have limits. Public-records law favors access to government records, but each request can still be limited by privacy, safety, juvenile law, medical records rules, ongoing investigations, or other statutory exceptions. Jail standards also require recordkeeping inside the facility, including inmate register requirements.
Key Statutes:
Wis. Stat. 19.31 states Wisconsin's public-records policy favoring access to information about government affairs and official acts.
Wis. Stat. 19.35 gives access rights and allows certain actual, necessary, and direct fees.
Wis. Admin. Code DOC 350.10 requires jails to keep an inmate register with identifying information.
Wis. Stat. 301.37 gives Wisconsin DOC authority over local detention facility standards and inspections.
Rock County and State Prison
No adult Wisconsin DOC prison was identified inside Rock County from the official DOC adult facilities list. That does not mean Rock County cases stop at the jail. Once a person is sentenced to prison, the correct search path moves to the Wisconsin DOC locator. DOC's own general information page notes that city and county jails are administered separately from DOC and that a person not found in DOC may still be in a local jail or visible through VINE.
The Wisconsin DOC general information page also explains family and contact topics for sentenced prison custody, including package vendors, messaging, and institution-level custody. Those rules are separate from Rock County Jail video visits, mail scanning, iCare commissary ordering, or Huber and electronic monitoring programs.
How to Search Rock County Custody
No official Rock County Sheriff's Office current-inmate roster, booking search form, recent-booking report, or booking-photo gallery was located on the county website during the official-source sweep. That finding changes the search order. Current custody questions should start with the jail operations phone line, while non-urgent records should go through the sheriff's records process. Court charges and sentenced prison status are searched through separate state systems.
- Decide whether the person is likely in county jail, state prison, federal custody, immigration detention, or juvenile detention.
- For immediate adult county custody questions, call Rock County Jail operations at 608-757-8000.
- For jail records, booking records, arrest reports, or photos, use the Rock County Sheriff's public records portal.
- Use Wisconsin VINE for custody-status checks and release-notification registration.
- Use WCCA after charges may have been filed in circuit court.
- Use Wisconsin DOC, BOP, or ICE locators when the custody stage has moved beyond the local jail.
Rock County Current Inmate Lookup
Because an official Rock County current jail roster was not located, a name search should not be built around a non-existent county form. The official access chain is a mix of phone, records, VINE, and court systems. The sheriff's office lists inmate or jail records at 608-757-7958, Central Control and attorney-client visit questions at 608-757-7957, and jail operations at 608-757-8000.
| Channel | Best Use | Rock County Detail |
|---|---|---|
| Jail operations | Immediate current custody question | 608-757-8000, 24 hours/day |
| Inmate or Jail Records | Jail record routing | 608-757-7958 |
| Public records portal | Booking record, arrest report, jail photo, records request | Rock County NextRequest portal |
| VINELink | Custody status and notifications | Wisconsin VINE portal |
| WCCA | Formal court charges and dates | Search Rock County circuit court cases |
Past Rock County Inmate Records
Released or older Rock County inmate records usually require a records request or a court search. The sheriff's records page lists jail records, medical records, arrest reports, incident reports, photos, audio, body camera, dash camera, citations, and records checks as examples. Requests may be verbal or written, but they must be reasonably specific about the subject matter and time period. The county prefers the public records online portal.
For a past arrest, include the person's full name, date of birth if known, approximate arrest or booking date, case number if known, and the record type sought. Fees may cover actual, necessary, and direct costs of locating, reproducing, mailing, shipping, or redacting records. Prepayment may be required if total costs exceed $50. Accident reports cost $3.
The Rock County records portal is the official online route for sheriff records requests. The portal screenshot captured for this build shows the request platform used when a current roster does not expose the record a reader needs.
Use the records portal for older jail documents, booking-photo requests, and arrest-report requests that are not answered by a direct custody call.
What Rock County Inmate Records Show
Rock County does not publish a public roster profile with confirmed public fields such as housing unit, charge list, bond, or photo. The available official sources show the local categories that can exist in jail and sheriff records. The jail rulebook describes admission, property inventory, medical intake, classification, housing movement, mail, visitation, commissary, phone and tablet use, grievances, Huber or work release, electronic monitoring, and discipline.
| Record Element | What It Can Show |
|---|---|
| Name and inmate ID/name number | Used for mail, request forms, ID cards, and inmate-related records. |
| Booking or admission date | May be available through jail records or arrest reports by request. |
| Property inventory | Personal property removed, inventoried, and stored during intake. |
| Classification | Northpointe level based on current charges, history, and jail behavior. |
| Court appearance information | Initial appearance timing and later court dates through court channels. |
| Bond or fine status | Payment status, warrant bond issues, or holds when releasable. |
Rock County Jail vs State Prison
The same person's record can move from one system to another. A recent arrest may begin at the Rock County Jail. Formal charges then appear in WCCA after the prosecutor files in circuit court. If the person receives a state prison sentence, DOC becomes the search source. Federal sentences, immigration detention, and federal pretrial custody use still different channels.
| County Jail | State Prison | Federal or ICE | |
|---|---|---|---|
| Who is covered | Pretrial adults, local sentences, warrants, holds | Sentenced Wisconsin DOC custody | BOP custody, ICE detention, or federal holds |
| Run by | Rock County Sheriff's Office | Wisconsin Department of Corrections | Federal agency or holding facility |
| Search route | Jail phone, jail records, VINE, WCCA | DOC Inmate and Offender Search | BOP Inmate Locator or ICE ODLS |
| Photo access | No official public photo roster found | DOC photo availability varies | No public mugshot gallery through locator |
State and Federal Inmate Search
The Wisconsin DOC locator is the right tool for people sentenced to state prison or under DOC supervision. The screenshot captured for this build shows the DOC public locator interface, which is separate from Rock County Jail custody and court-case search.
Federal sentenced prisoners are searched through the BOP Inmate Locator. Immigration detainees are searched through ICE Online Detainee Locator System. Neither tool is a Rock County jail roster, and neither should be used as proof that a person is or is not currently in the county jail.
Rock County Detention Facilities
The local facility list is short but important. Rock County Jail is the adult custody center. The Youth Services Center is secure juvenile detention and should not be treated as an adult inmate lookup source. No adult DOC prison, BOP institution, or ICE detention center was identified inside Rock County.
- Rock County Jail - adult county jail for sentenced and unsentenced male and female inmates, with jail records handled by the sheriff.
- Rock County Youth Services Center - secure juvenile detention for youth ordered through Rock County Juvenile Court.
Rock County Inmate Population FAQ
How large is the Rock County inmate population?
The Rock County Jail 2024 PREA review reported a 2024 average daily population of 325 and a Dec. 31, 2024 snapshot of 354 inmates. The sheriff's employment facts list a 515-inmate capacity.
Does Rock County have an online jail roster?
No official current-inmate roster or booking-search form was located on the Rock County Sheriff's Office website in the official-source sweep. Use the jail phone line, inmate/jail records number, records portal, VINE, WCCA, and DOC locator based on the custody stage.
Where are Rock County court charges searched?
Formal charges after arrest are searched in Wisconsin Circuit Court Access. WCCA is separate from jail custody, so a court case can show charges even when the person is no longer in the jail.
Are juvenile detainees listed with adult inmates?
No. The Rock County Youth Services Center is a secure juvenile detention facility. Juvenile custody and records access should be handled through the facility, juvenile court, counsel, or authorized county officials.
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