Justizanstalt Graz-Jakomini, Prison center in Jakomini district, Graz, Austria.

Justizanstalt Graz-Jakomini is a court prison on the east side of Conrad-von-Hötzendorf-Straße in Graz's Jakomini district, built into the south and east wings of the Landesgericht für Strafsachen between 1890 and 1895. The roughly three-storey complex covers about 26,000 m², of which around 10,500 m² is built over, and holds up to 443 prisoners. A separate branch on Paulustorgasse in the Innere Stadt adds capacity for 70 more.

This correctional facility was built between 1890 and 1895 as part of the Regional Court for Criminal Matters complex. Over time the institution expanded and added specialized departments to meet changing needs and modern requirements for incarceration.

Inmates can take up an apprenticeship in 12 recognised trades alongside school lessons, and a mother-child department lets mothers keep small children with them in custody. The writer Jack Unterweger, known as the "Häfenliterat", died by suicide here in 1994.

The prison itself cannot be visited; only the Regional Court for Criminal Matters, which shares the building on the east side of Conrad-von-Hötzendorf-Straße, is open to the public. The site covers about 26,000 m², of which roughly 10,500 m² is built over. The Paulustorgasse branch lies in the Innere Stadt, separate from the Jakomini complex.

The facility operates a specialized educational program in partnership with Sonderpädagogisches Zentrum Ellen Key for young inmates. Additionally it features a dedicated mother-child department where mothers can stay with their small children during their time in custody.