From mid-August until the end of the German occupation in May 1945, 12,000 prisoners passed through the camp's gates.
Towards the end of the war, the Swedish count Folke Bernadotte tried to get all Scandinavian concentration camp prisoners to Sweden.
Later on, the Danish state took over from the resistance movement, using the camp as the country's largest correctional facility for convicted collaborators.
Some parts of the original 1944–45 prison camp, which had been demolished, have now been reconstructed, including a watchtower and a portion of the barbed-wire fence.
The area also houses a residential continuation high school named Frøslevlejrens Efterskole.