The Österåker Prison (Swedish: Anstalten Österåker, commonly known as Österåkersanstalten) is a prison located in Österåker Municipality, thirty kilometers north of Stockholm, Sweden.

The facility also contains a remand prison with the capacity for 80 inmates.

Since 1976 the prison is concentrated on inmates with different types of abuse problems.

American country singer Johnny Cash performed at the prison on October 3, 1972.

[1] Between the songs Cash can be heard speaking Swedish, which is met with roaring approval from the inmates.