State Correctional Institution â Smithfield (SCI Smithfield) is a close-security correctional facility for men on the grounds of SCI-Huntingdon, near Huntingdon in the Allegheny Mountains. SCI Smithfield was opened in 1988 during a "growth spurt of the "bursting at the seams" correctional system in the Commonwealth of Pennsylvania.
In December of 2025, Smithfield held 1,182 inmates against a public capacity of 1,555 individuals, or 76.0%.