jail411

Sources, definitions, and limits

How we count

A number is useful only when its source, definition, and date travel with it.
Jail411 keeps agency operating counts separate from directory-record totals and withholds stale answers rather than presenting them as current.

Where the directory data comes from

Facility records come from HIFLD (Homeland Infrastructure Foundation-Level Data), a public federal dataset, together with Federal Bureau of Prisons records. Our copy holds 6,747 facilities across 51states and territories, and was refreshed in February 2026.

Two answers, sourced independently

State prisons and county/local jails are different systems and never share a verification status. A verified prison count does not make a jail count trustworthy, or vice versa. Official statewide jail totals are labeled as official. Where that research is not complete, we publish a clearly labeled provisional inventory count so every state remains useful tonight without pretending the directory is an official census.

Prison-side records also preserve the agency’s own counting unit: state prisons, correctional institutions, or adult correctional facilities. We do not silently relabel a reentry center or treatment-oriented adult facility as a prison merely to fit a search phrase.

Why our prison count differs from the facility inventory

HIFLD classifies facilities for infrastructure planning. It labels many things “prison” that a state corrections department does not: community-based correctional facilities, juvenile centres, federal prisons, and camps or annexes attached to a larger institution.

Ohio is the clearest example. The source inventory contains 71 Ohio rows originally labeled as prison-type records. After Jail411 separates other systems and groups linked camps and annexes with their parents, 48 directory sites remain in the state-prison class. The Ohio Department of Rehabilitation and Correction reports 28 state prisons. Those numbers are not interchangeable: the raw infrastructure dataset, the cleaned directory class, and the state agency’s operating institution count answer three different questions.

Why one state can report three different prison counts Ohio, August 2026. The raw source inventory contains 71 rows labeled as a prison-type facility. After Jail411 separates other systems and links camps and annexes to a parent record, 48 directory sites remain classified as state prisons. The Ohio Department of Rehabilitation and Correction reports 28 state prisons it operates, verified against Ohio Office of Budget and Management capital-budget testimony dated June 2, 2026. The gap between the 48 directory sites and the 28 agency-reported institutions reflects two counting systems that do not share a common unit; Jail411 does not claim to reconcile it further. The same three-way gap between raw inventory rows and the state agency's own operating count appears across all 51 states and the District of Columbia. Why one state can report three different prison counts Ohio, August 2026 — raw inventory, directory classification, and the state agency’s own count answer three different questions. STAGE 1 · RAW INVENTORY 71 Raw infrastructure rows Rows in the source dataset labeled a prison-type facility for Ohio, unfiltered. SOURCE · HIFLD / BOP, FEB 2026 −23 rows reclassified or linked to a parent record STAGE 2 · DIRECTORY CLASS 48 Directory state-prison sites What remains after Jail411 separates other systems and links camps/annexes to a parent. JAIL411 CLASSIFICATION METHOD different counting unit — not a gap Jail411 can verify further STAGE 3 · AGENCY COUNT 28 State-reported institutions Ohio DRC’s own count of institutions it operates, in its own counting unit. VERIFIED AUG 2026 · OHIO DRC This pattern isn’t unique to Ohio. All 51 states and DC show a gap between raw inventory rows and the state agency’s own operating count. Sources: HIFLD facility inventory, Feb 2026 · Jail411 facility classification · Ohio Office of Budget and Management, FY2027–28 capital budget testimony dated June 2, 2026, verified Aug 12, 2026.
Every state shows a gap of this shape, not just Ohio. Jail411 publishes the agency’s own figure as the answer and shows the directory total beside it.

How facilities are classified

Classification is rule-based by default. Facility names and jurisdiction fields are matched against patterns for federal, juvenile, community-corrections and ICE facilities, and camps and annexes are linked to their parent institution so they are not counted twice — 101 records are currently linked this way.

150 records have been reviewed by hand; the rest are rule-classified. We do not claim every record has been individually verified. Rules have limits: a community-based facility whose name gives no signal will sit under state prisons until a person corrects it. 448 records lack the data to classify confidently and are shown as unclassified rather than guessed.

Known gaps

Re-verification

Every count carries a verification date and source. Jail counts also carry the date represented by the underlying census or roster, which prevents an old report checked today from looking current. Any source count older than 12 months is withheld from answer text, metadata and structured data until it is rechecked.