Mariposa County Inmate Population Overview
The Mariposa County inmate population is centered on the Mariposa County Adult Detention Facility, a Type II local adult detention facility run by the Sheriff's Office. That jail holds adults arrested in Mariposa County, people awaiting court, sentenced county-jail inmates, court-ordered commitments, and people booked or housed for local, state, and federal law-enforcement agencies. The public lookup system is narrow: the Sheriff's Office publishes a 24-hour Daily Booking Report PDF rather than a broad searchable jail database.
Mariposa County also has custody systems that do not belong to the county jail roster. Mount Bullion Conservation Camp #39 is a CDCR/CAL FIRE state fire camp for sentenced CDCR incarcerated persons. Juvenile detention is handled through probation and is more restricted. Yosemite National Park can create federal custody questions, and those cases may or may not pass through the county jail. A useful Mariposa County inmate population search therefore starts with the location and custody stage, not just a name.
Mariposa County Inmate Population Statistics
Official Mariposa figures show a small jail where a few people can change the operational picture. The FY 2025 Sheriff Annual Report describes a 58-bed Type II facility. The official jail history uses about 60 incarcerated persons as a plain-language capacity figure. The 2021 Sheriff Annual Report says COVID protocols reduced operational capacity from 58 to 27, which shows why rated beds are not always the same as usable beds.
| Measure | Figure | Source / Year |
|---|---|---|
| Adult jail rated capacity | 58 beds | FY 2025 Sheriff Annual Report |
| Public history capacity wording | About 60 incarcerated persons | Official Jail History |
| COVID-era operational capacity | Reduced from 58 to 27 | 2021 Sheriff Annual Report |
| Mount Bullion camp capacity | 100-inmate capacity | CDCR Mount Bullion page |
| Latest dashboard data availability | JPS data through 2025 Q4 | BSCC JPS Dashboard, updated March 17, 2026 |
Mariposa County Inmate Population Trends
The BSCC Mariposa demographic reference packet shows the county jail average daily population falling from 49 in 2012 to 27 in 2021, with 2021 based on the first three quarters. The decline was already visible before COVID, then became sharper during the 2020 and 2021 operating period. The 2021 Sheriff report also shows bookings falling from 1,069 in 2017 to 551 in 2021.
| Year | Average Daily Population | Notes |
|---|---|---|
| 2012 | 49 | Highest year in the 2012-2021 BSCC reference series. |
| 2015 | 43 | Grand Jury material also described the jail near 80% capacity. |
| 2017 | 41 | Sheriff report listed 1,069 bookings. |
| 2019 | 37 | Bookings had declined to 808. |
| 2020 | 31 | COVID-era reductions began affecting operations. |
| 2021 | 27 | First three quarters only; capacity was reduced under COVID protocols. |
The trend data should not be read as a live head count. The current jail population can change after arrests, releases, transfers, holds, and sentencing. The BSCC dashboard is the better visual source for newer statewide jail profile data, while the Sheriff and Grand Jury reports explain local capacity and operating limits.
Who Is in Mariposa County Custody
Mariposa's jail population includes several groups. Some people are newly booked and waiting for release, bail, or first court action. Some are unsentenced and waiting for hearings, trial, or sentencing. Others may be serving a county jail sentence, waiting for state-prison transport, or held on a warrant, probation, parole, or other-agency matter. BSCC defines unsentenced inmates as people in custody before sentencing on one or more charges, while sentenced inmates have been tried and sentenced on all charges.
Vera's Mariposa County fact sheet adds useful 2021 context: it reported an average jail population of 29, 551 jail admissions, 285 arrests, 15 people sentenced to state prison, 54 county residents in state prison, 67% of the jail population as pretrial, and 30% of the jail population with mental-health needs. Those figures are not a current roster, but they help explain why the county jail is mostly a pretrial and short-term custody system while CDCR holds sentenced state prisoners.
Mariposa County Jail Capacity
A 58-bed jail can still have practical capacity problems. The Grand Jury report noted that gender separation and gang separation can reduce available housing. Current jail materials describe classification based on booking status, current and past behavior, and the nature of current and past charges. Housing categories include general population, administrative separation, lockdown separation, and protective custody. Medical or mental-health needs can also affect placement.
The FY 2025 Sheriff Annual Report says the jail has single-cell and dormitory-style housing, a medical exam room, a full-service kitchen, administrative and program areas, and designated exercise spaces for male and female inmates. It also says BSCC and Standards and Training for Corrections inspections produced favorable evaluations. A separate BSCC 2024 adult noncompliance attachment listed Mariposa Adult Detention Facility for safety-check documentation and process issues under Title 15 section 1027.5, with corrective action due in November 2024.
Mariposa County Jail Access Laws
California law is the reason basic booking information can be public while medical, movement, juvenile, and investigative details remain limited. Mariposa's Daily Booking Report page cites Government Code 7923.610 for public arrest and booking data. Court records have their own access rules, and jail standards come from BSCC and Title 15. The result is public access, but not a complete operational feed.
Key Statutes:
Government Code 7920.000 names the California Public Records Act as the state access framework.
Government Code 7923.610 covers basic arrest and booking information such as name, physical description, booking time, bail, holding location, charges, warrants, and holds.
Penal Code 6031.1 supports BSCC inspection and reporting duties for local detention facilities.
Penal Code 13665 limits law-enforcement social-media sharing of many booking photos.
Search Mariposa County Recent Bookings
Mariposa County does not publish a conventional searchable current-inmate roster in the official sources inspected. The Sheriff's jail page links to a "Who's In Jail Report" image that routes to the Daily Booking Report. That page says it covers people arrested and booked into the Adult Detention Facility within the last 24 hours. It is a PDF, not a live name-search portal.
The official Daily Booking Report page is the first image source for recent Mariposa County inmate population lookup.
The screenshot shows why the public search path is different from counties with searchable roster portals: readers open a daily PDF and then use phone, VINE, court, or records requests when the PDF is too narrow.
| Field Label | Type | Required | Notes |
|---|---|---|---|
| Daily Booking Report (PDF) | Link | N/A | Opens the county booking PDF. |
| Search fields | None | N/A | No Last Name, First Name, or Booking Number search was present. |
| Filters or tabs | None | N/A | No current or released tabs were observed. |
| Notices | Text | N/A | Report covers the last 24 hours and cites CPRA booking disclosure law. |
How to Search Mariposa County Inmates
A practical Mariposa County inmate population search uses a fallback chain because the public booking report has a short time window. Start with the report if the arrest was recent. If the person does not appear, that absence does not prove there was no arrest. The person may not be booked yet, may have been released, may be outside the 24-hour window, may be in another county, or may be in state or federal custody.
- Open the official Daily Booking Report page and review the current PDF for recent bookings.
- Use the booking number, name, arrest date, charges, bond, agency, and jurisdiction fields if the person appears.
- Call the Adult Detention Facility at 209-966-3616 for current custody or bail questions that the report cannot answer.
- Use Mariposa County VINE or 877-411-5588 for custody-status notifications.
- Use NextRequest for older booking records or records not posted online.
- Switch to court, CDCR, BOP, or ICE channels when the person is no longer a county-jail booking search.
Mariposa County Booking Record Fields
The inspected booking PDF shows public data that helps identify the right person and understand the arrest stage. It does not show every jail-management field. Housing, medical status, movement, and court-date details were not visible in the inspected PDF, and the jail page says movement information such as court, medical, and dental appointments will not be released by facility staff.
| Field | What It Shows |
|---|---|
| Booking Number | County booking identifier, with an observed YYYY-NNNNN format. |
| Jailing Party Name | Name of the person booked, shown in last-name-first format. |
| Arrest Date Time | Date and time tied to the arrest or booking event. |
| Release Date | Release date if shown by report generation; may be blank. |
| Charges | Arrest or booking charges, with statute abbreviations such as PC, HS, or VC. |
| Bond Amt | Per-charge bail or bond amount where shown. |
| Warrant Type / Number | Warrant fields when the booking involves a warrant. |
| Arrest Agency | Agency such as the Sheriff's Office, CHP, or Yosemite National Park. |
County Jail vs State Prison
Mariposa County jail custody and California state prison custody are different systems. The county booking report is for people booked into the Adult Detention Facility. CDCR CIRIS is for people in CDCR custody after state commitment, including Mount Bullion Conservation Camp. Federal and immigration custody use separate tools. Using the wrong system is the most common reason a Mariposa County inmate population search comes up empty.
| County Jail | State Prison / Camp | Federal or ICE | |
|---|---|---|---|
| Who is held | Recent arrests, pretrial detainees, county sentences | Sentenced CDCR incarcerated persons | Federal prisoners, federal defendants, immigration detainees |
| Local example | Mariposa County Adult Detention Facility | Mount Bullion Conservation Camp #39 | Yosemite federal holding questions |
| Where to look | Daily Booking Report, jail phone, VINE | CDCR CIRIS | BOP, ICE ODLS, federal court channels |
| What not to assume | The 24-hour report is not a full census | CDCR is not the county jail roster | BOP may not show pretrial federal holding right away |
Mariposa County VINE Notifications
Mariposa County's VINE page says VINE provides 24-hour access to custody information, custody-status verification, and automatic notice of custody-status changes. It can help when the Daily Booking Report is too limited or when a person may have been released. VINE also warns that there may be a delay before an arrestee is officially booked, and that people released on bail or own recognizance may not be considered in custody.
The official Mariposa County VINE page is another successful manifest capture for custody lookup.
VINE is not a court docket and not a long-term booking archive, but it is useful for live custody notification when the county booking PDF does not answer the current-status question.
Mariposa County Arrest to Court
A booking charge is not the same as a court charge. After arrest and booking, the District Attorney decides what criminal charges to file, amend, reduce, dismiss, or add. Mariposa Superior Court's Criminal Division explains that only the State, through the District Attorney in each county, can charge people with criminal violations. The court portal then becomes the right tool for filed cases, docket entries, hearings, and court records after an arrest.
The court's public portal opened March 17, 2023 after Tyler/Odyssey conversion and covers cases filed after 1990, with party, attorney, docket, document, hearing, and calendar information where public. For custody and booking details, use the Mariposa County jail inmate records page. For court records after charges are filed, use the court portal and Criminal Division copy process.
Mariposa County Detention Facilities
The Mariposa County inmate population map has one adult county jail, one state fire camp, one juvenile detention facility, and one federal holding facility listed from older Grand Jury material. They do not share one roster. Each facility page gives the correct custody route for that facility type.
- Mariposa County Adult Detention Facility holds adults arrested or booked locally, pretrial detainees, county sentences, commitments, and some other-agency custody.
- Mount Bullion Conservation Camp #39 is a CDCR/CAL FIRE conservation camp for sentenced CDCR incarcerated persons assigned to fire and conservation crews.
- Mariposa County Juvenile Hall is a special-purpose short-term youth detention facility, with restricted juvenile access rules.
- Yosemite National Park Federal Holding Facility is a federal holding reference with limited current public detention detail, not a county roster.
Mariposa County Jail Context
Mariposa's jail history is unusually specific. The county's first recorded jail was built in 1852 from logs. Small jails in Hornitos and Coulterville still stand. The 1858 granite jail used 24-inch blocks quarried at Mormon Bar and once had a gallows. A 1892 fire, possibly tied to an escape attempt, gutted the building and killed the only incarcerated person. The current Highway 49 North jail opened in March 1995, about one mile north of Mariposa.
The county's geography also shapes custody searches. Yosemite brings federal law-enforcement overlap into a rural county with a small resident population. Mount Bullion adds a state fire-camp layer. A person arrested by Yosemite National Park may appear in the county booking report if booked locally, but federal custody can also route through federal court, attorney, USMS, or BOP channels. The search route depends on where the person was taken after arrest.
Mariposa County Inmate Population FAQ
How big is the Mariposa County inmate population?
The adult jail is rated for 58 beds, and BSCC reference data showed a 2021 average daily population of 27 for the first three quarters. The exact current number should be checked through official jail or BSCC channels because the public Daily Booking Report is a 24-hour booking release, not a full daily census.
Does Mariposa County have a searchable jail roster?
No conventional searchable jail roster was found in the official sources inspected. Mariposa publishes a Daily Booking Report PDF for people arrested and booked into the Adult Detention Facility within the last 24 hours. Use jail phone confirmation, VINE, and NextRequest when the PDF is not enough.
Where are state prisoners from Mariposa County listed?
State prisoners are searched through CDCR CIRIS, not the county jail report. That includes people assigned to Mount Bullion Conservation Camp #39, which is in Mariposa County but is operated by CDCR and CAL FIRE.
Does the Sheriff app replace the jail lookup?
The Apple App Store lists an official Mariposa County CA Sheriff iOS app updated July 8, 2024, but the inspected listing described public-safety news, tips, and communication features. It did not identify an inmate roster, mugshot lookup, warrant search, or records-request function.