How to Look Up Marion County Jail Population Data
The Marion County Sheriff's Office jail page is the primary source. It states the jail currently houses about 400 adults in custody and books roughly 8,000 people a year. It does not run a live daily dashboard with charts. For deeper numbers, county budgets, public safety coordinating council packets, and sheriff reports carry more detail than the public web page.
Read each figure with its source in mind. The "about 400" count is a current snapshot, not a fixed bed capacity. National datasets, such as Bureau of Justice Statistics jail reports and Vera Institute trends, put the Marion County numbers in context. Those are not county records, so treat them as comparison points rather than official county counts.
Marion County Jail Capacity Overview
The main jail is a 151,000-square-foot direct supervision facility. The county also runs a transition center and a juvenile detention setting. Exact rated bed capacity is not published on the current jail page, so the table uses the official figures that are published.
| Facility | Reported Figure | Function |
|---|---|---|
| Marion County Jail | About 400 in custody; 151,000 sq ft | Pretrial, short sentences, federal holds, transfers |
| Marion County Transition Center | Not published | Work-release, transition, and reentry custody |
| Marion County Juvenile Detention | Not published | Youth detention under the juvenile department |
Because the jail acts as a prisoner-exchange hub, the daily count can swing with transports in and out.
Direct Supervision and the Marion County Population
The Marion County Jail runs on a direct supervision model. Deputies are stationed inside the housing units, not just watching from a control booth. That design shapes how the population is grouped and managed. People are classified at intake and housed by risk and needs.
The model matters for population data. Housing units such as protective custody and female units appear in the roster location field. A blank location means the person is housed in the Marion County Transition Center. So the population is spread across several units and one off-site center, not one open dorm.
Average Daily Population and Bookings
The published snapshot is about 400 adults in custody. That works as a rough average daily population for the Marion County Jail. The booking volume is larger because people cycle through fast. The jail books roughly 8,000 people a year, which is about 22 bookings a day on average.
The gap between 400 in custody and 8,000 bookings shows how short many jail stays are. Many people are booked, then released within hours or days on bail or after a first appearance.
This churn is normal for a county jail. A state prison holds people for years, so its count is steady. A Marion County jail count moves daily as people are booked, post bail, see a judge, or transfer out. That is why a single-day snapshot can differ from a yearly average, and why the booking total dwarfs the daily count.
Pretrial and Sentenced Population Categories
The Marion County Jail holds several kinds of adults in custody. A precise pretrial-versus-sentenced percentage is not published on the current official page. Still, the categories the jail holds are clear, and they shape the daily count.
| Category | Description |
|---|---|
| Pretrial | People awaiting trial who have not been convicted. |
| Sentenced (local) | People serving a sentence of one year or less. |
| Federal holds | People held for federal authorities. |
| State transfers | People sentenced to prison and awaiting transfer. |
The jail holds both misdemeanor and felony cases. A detailed misdemeanor-versus-felony split is not published online, so use county reports for exact shares.
State and Federal Custody Counts
Not everyone arrested in Marion County stays in the county jail. People sentenced to prison move to the Oregon Department of Corrections, which keeps its own population counts and offender search, shown below.
The Oregon DOC offender search covers people in state prison custody.
People held for federal authorities are counted by the Bureau of Prisons, not the county, as shown below.
The federal BOP inmate locator tracks people in federal custody from 1982 forward.
So a full picture of people from Marion County who are in custody spans three systems: the county jail, the state DOC, and the federal BOP.
Prisoner Exchange and Transport
The Marion County Jail also works as a prisoner-exchange hub. It handles transport between other Oregon facilities and neighboring states. That role adds people who are only passing through, which can nudge the daily count up or down.
This is one reason a single-day population reading is not a clean measure of local crime. Some of the people counted are not Marion County cases at all. They are in transit. When you compare counts across days, keep transport activity in mind, because it adds noise to the Marion County jail population number.
Mental Health and Program Population
A share of the jail population gets health and program services. Mental health staff provide suicide risk screening, brief counseling, crisis intervention, and medication referral. The jail does not release an adult in custody's medical information without a signed release.
More than 100 citizen volunteers run programs inside. Those include Alcoholics Anonymous, drug and alcohol education, a GED program, and religious services. Work assignments such as kitchen and laundry depend in part on good behavior. These programs reach a meaningful part of the Marion County jail population, though exact counts are not published.
National and State Context
To judge a local jail number, you need a yardstick. National and state datasets give one, usually as a rate per 100,000 residents. The table below shows where each level's data lives. Marion County figures come from county sources, while state and national rates come from outside agencies.
| Level | What It Measures | Where to Find |
|---|---|---|
| Marion County | Jail count and bookings | Sheriff reports and county budgets |
| Oregon | Statewide jail and prison rates | Bureau of Justice Statistics |
| National | Jail population per 100,000 | BJS and Vera Institute |
Use the same year for each level when you compare, since rates shift from year to year.
Population Trends Over Time
A current Marion County five-year jail population table is not posted on the accessible official pages. The live roster can count people in a single search, but that is not an official trend report. For multi-year trends, the better sources are county budgets, sheriff annual reports, and public safety coordinating council materials.
National context still helps. The Vera Institute and BJS track jail trends by state and county, which can frame how Marion County compares over time. Always confirm a trend claim against an official county document before relying on it.
Searching for Marion County Inmate Records by Name
This page covers aggregate jail population data, not individual lookups. For a name-based search of the live jail roster, see Marion County inmate records. The public sex offender registry, shown below, is a separate population dataset, not a jail roster.
The Oregon State Police sex offender registry lists Level 3 offenders statewide.
For release status and alerts, see released inmates.
Where the Marion County Data Comes From
The figures here trace to a few sources. The county jail page provides the current count, the facility size, and the annual booking volume. County budgets, sheriff reports, and public safety coordinating council packets carry deeper breakdowns. For state and national comparison, the Bureau of Justice Statistics and the Vera Institute publish jail data. When a number is not county-specific, it is marked that way, because a national rate is not the same as a Marion County count. For individual custody questions, the Marion County Jail can be reached at 503-588-8595, and the live roster is the place for name searches.