Osipov was born on  in Petrograd to a working-class Russian family. After completing his tenth grade of school he focused on his dream of following in his father's footsteps by joining the military, participating in sharpshooting and sports before joining the Red Army in August 1937.
Osipov, born into a working-class Russian family in Petrograd, aspired to follow his father's footsteps by joining the military. He honed his skills in sharpshooting and sports before enlisting in the Red Army in August 1937.