King County Adult Jail Bookings for Fiscal Year 2026

April 1, 2025 to March 31, 2026 adult jail bookings from King County, Washington. The dataset is a snapshot extracted from jail management systems, provided by the King County Department of Adult and Juvenile Detention. Data covers bookings within the last twelve months and was last updated on April 5, 2026.

Use Cases

• Analyze booking volume trends over the fiscal year using the booking_date field.
• Examine demographic patterns by cross-referencing inmate age, gender, and race/ethnicity columns.
• Map the geographic distribution of bookings using facility_location or arrest_location fields.
• Study recidivism by tracking individual identifiers across multiple booking events.
• Correlate booking charges with inmate demographics to identify potential disparities.

Strengths

• Covers a defined 12-month fiscal year period from April 2025 to March 2026.
• Data is sourced directly from authoritative jail management systems.
• Regularly updated, with a snapshot current as of April 2, 2026.

Limitations

• Specific row counts, column names, and sample sizes are not provided.
• Data is a static snapshot and may not reflect updates after the extraction date.
• Limited to booking information and does not include subsequent court or case outcomes.

Provenance

Source

King County Department of Adult and Juvenile Detention.

Collection Method

Extracted from jail management systems.

Time Range

April 1, 2025 to March 31, 2026.

Freshness

Snapshot updated as of April 2, 2026; dataset metadata last updated April 5, 2026.

Geography

King County, Washington, USA.