Pielisjoki Castle (Finnish: Pielisjoen linna) is a 19th-century public building in the city of Joensuu, in eastern Finland.

It is located in the city centre, situated on a small island in River Pielisjoki.

[1][3][4] The building has never served as a castle as such; after it ceased to operate as a granary, it was given over to the Suojeluskunta civil guard and converted in 1919 to office and residential use, according to the designs by the architect Ole Gripenberg [fi].

[1] The ground floor housed staff quarters, arsenal and a drive-through carriageway for loading and offloading vehicles.

[3] Following a renovation in the late 1960s, the building housed for over three decades various research units and activities of the University of Eastern Finland.