Riihimäki prison camp was a prison camp operating in the area of the Riihimäki garrison after the Finnish Civil War in 1918. It held, at most, around 8 500 red guards. According to the war victims of Finland -database, a total of 981 prisoners died in camp, in result of executions, hunger and disease. The camp was closed down in October 1918, and the forced labour facility replacing it was shut down in the spring of 1921. The memorial of the prison camp is located in the Tienhaara part of Riihimäki.