| Suomenlinna prison camp | |
|---|---|
| Concentration camp | |
 | |
| Coordinates | 60°08′37″N 24°59′04″E / 60.14361°N 24.98444°E |
| Location | Suomenlinna, Helsinki, Finland |
| Operated by | Government of Finland |
| Operational | 12 April 1918 – 14 March 1919 |
| Inmates | Reds |
| Number of inmates | c. 10,000 |
| Killed | c. 1,100 |
Suomenlinna prison camp (Finnish: Suomenlinnan vankileiri, Swedish: Sveaborgs fångläger) was a 1918 Civil War of Finland concentration camp in the Suomenlinna Fortress, Helsinki. It was established by the White Army for the Red Guard fighters taken prisoner after the Battle of Helsinki. The camp operated from April 1918 to March 1919. It was a subcamp for the Helsinki prison camp, which included the camps of Suomenlinna, Santahamina, Katajanokka and Isosaari.