Start at the source: state-run portals
Every state runs at least one free arrest or court database. Texas DPS hosts the official statewide Criminal History Name Search ($3/name), and Pennsylvania's Unified Judicial System portal publishes free docket sheets statewide. North Carolina lets anyone search prisoners, probationers and parolees through the NC DAC online tool. Always start with the state — county and city sites are downstream copies.
Sheriff jail rosters update fastest
If you want recent bookings (last 24-72 hours), county sheriff sites are the freshest data source in the country. They publish names, booking photos, charges, and bond amounts within hours of intake. Use search terms like "[county] sheriff inmate roster" or "current inmates [county name]". Note that California departments increasingly redact full names under data-privacy rules, and roughly a dozen jurisdictions (LAPD, NYPD, Chicago, Cincinnati) now anonymize names entirely on public-facing rosters.
Federal arrests live in PACER and GovInfo
Federal arrests are routed through the U.S. District Court system. The free GovInfo portal publishes opinions and many court documents at no cost. For docket-level detail, PACER (pacer.uscourts.gov) charges $0.10/page, capped at $3 per document — and a 2024 class-action settlement refunded over $100 million in PACER fees, with the new fee waiver doubled in 2025.
Crime statistics complement arrest records
The FBI's Crime Data Explorer aggregates national, state, and city crime statistics drawn from the Uniform Crime Reporting program. It will not list individuals, but it will tell you whether a neighborhood is trending toward more violent crime, more property crime, or fewer arrests overall. USA.gov also routes citizens to the right resource.
What you cannot find online
Sealed records, juvenile arrests, dismissed-and-purged cases, and most pre-arraignment incident reports are not publicly accessible. Clean Slate laws in 13 states automatically seal certain conviction records after a waiting period — Pennsylvania, Michigan, New York, and California lead the way (Clean Slate Initiative state tracker). If a record vanishes between two searches, an automatic seal is the likely reason.