State Correctional Institution – Forest

The State Correctional Institution – Forest is one of two identical correctional facilities in Pennsylvania that were constructed in the beginning of the twenty-first century to hold maximum-security male inmates. SCI Forest is located in the community of Marienville, in remote Forest County.

In December of 2025, Forest held 2,246 inmates against a public capacity of 2,582 individuals, or 87.0%.