Idaho Maximum Security Institution

Idaho maximum-security prison that houses death-sentenced prisoners and contains the state execution chamber in F-Block.

Role in the death-penalty system

IMSI opened in 1989 and houses close-custody prisoners, including people under sentence of death.

The execution chamber is located in F-Block.

Idaho designated firing squad as the primary execution method beginning July 1, 2026, and retrofitted the F-Block execution unit accordingly.

Execution methods and historical context

connections

Idaho Maximum Security Institution is part of the Death Penalty Prisons and Execution Facilities in the United States hub. As the archive expands, additional executions and prisoners can be attached without turning the facility page into a loose list: each connection is kept as a structured, source-bound relationship.

Sources

– Idaho Department of Correction — Idaho Maximum Security Institution – Idaho Department of Correction — Execution Chamber