CrimeDB

PennsylvaniaCounties

Allegheny County

1,225,035 people, served by 147 police agencies that report to the FBI. Below: how a case moves here, from arrest to court.

How a case moves here

Allegheny County follows Pennsylvania law on arrests, release, and courts. These rules are the same in every county in the state; the full set covers prosecutors, defense, and jails too.

Who decides release first

Outside Philadelphia, a magisterial district judge sets bail at the preliminary arraignment. In Philadelphia, an arraignment court magistrate appointed by the Municipal Court sets it; magistrates need not be lawyers if they complete a training program. Neither may set bail for murder or voluntary manslaughter; a Common Pleas judge does.

Pa.R.Crim.P. 51942 Pa.C.S. 1515(a)(4)42 Pa.C.S. 1123(a)(5)
Time to see a judge

A person arrested without a warrant must have a preliminary arraignment without unnecessary delay. The rule sets no hour limit. The U.S. Supreme Court's 48-hour rule for a probable cause finding applies as the federal floor.

Pa.R.Crim.P. 516(A)
Money bail

Money bail is allowed. The rules list five kinds of release, from release on recognizance to a money condition no larger than needed to ensure the person appears.

Pa.R.Crim.P. 524(C)
Courts

The Court of Common Pleas, organized in 60 judicial districts, tries felonies and misdemeanors. Magisterial district judges hear summary offenses, the lowest grade, and hold first arraignments and preliminary hearings. In Philadelphia, the Municipal Court tries crimes punishable by up to five years without a jury.

Unified Judicial System of Pennsylvania, Courts of Common Pleas42 Pa.C.S. 151542 Pa.C.S. 1123
Judges and magistrates

Common Pleas judges win a contested election for a 10-year term, then run in yes-or-no retention elections without party labels. Magisterial district judges are elected in contested elections to six-year terms and need not be lawyers. All other judges must be members of the bar.

Unified Judicial System of Pennsylvania, How Judges Are Elected

Read from the statutes and court rules cited, 2026-09-30. The prison board statute covers counties of the third to fifth class and those that opt in; Philadelphia and Allegheny run jails under other arrangements not read here.

What this county does differently

Pretrial practice

Advancing Pretrial lists it as a Public Safety Assessment site since 2016.

Advancing Pretrial Policy and Research, PSA sites list (page modified 2026-06-03)

Police agencies

Agencies: FBI NIBRS master file 2025 batch headers; names from the FBI agency list, pulled 2026-09-29. An agency that serves several counties appears on each. Population served is the FBI's figure.

Crime and arrests

No figures yet

Reported offenses and arrests for Allegheny County, counted by the agencies that serve it, appear here once the county series is published. NIBRS reporting here started as early as December 2020.