Trosna is the name shared by several rural localities situated across different regions of Russia. These locations include various villages and settlements distributed throughout the Bryansk, Kaluga, Oryol, and Tula Oblasts.
Specific instances of Trosna include a settlement in the Zhukovsky District of Bryansk Oblast and multiple villages located within the Khvastovichsky and Sukhinichsky Districts of Kaluga Oblast. Additionally, the name identifies localities in the Bolkhovsky and Trosnyansky Districts of Oryol Oblast, as well as villages in the Chernsky and Yefremovsky Districts of Tula Oblast.