Rautjärvi (Finnish pronunciation: [ˈrɑu̯tˌjærʋi]) is a municipality in the South Karelia region of Finland.

More than half of Rautjärvi's residents live in Simpele, the administrative center of the municipality.

[6] The neighboring municipalities of Rautjärvi are Parikkala and Ruokolahti, while to the east is the Russian border.

[9] Rautjärvi's wooden church, completed in 1881, was destroyed in a fire on Christmas Day in 2022.

[10][11] The villages of Rautjärvi are inclusive of: Haakanala, Hallilanmäki, Hiivaniemi, Hinkkala, Hynnilä, Ilmee, Jurvala, Kalpiala, Kekäleniemi, Kokkola, Kopsala, Korjola, Korpijärvi, Lankila, Latvajärvi, Miettilä, Niskapietilä, Partila, Pirhola, Purnujärvi, Rautjärvi, Siisiälä, Simpele, Torsansalo, Uimola, Untamo, Viimola, Vähikkälä.