Koskela married film director Oskari Sipola in December 2019. She gave birth to a daughter, Else, in 2020 after earlier suffering from a miscarriage. The family live in the Herttoniemi suburb of Helsinki. She is a member of the Team Play band. Koskela and Sipola jointly filed for divorce in July 2024. Since 2024 Koskela has been in relationship with the Left Alliance politician and former footballer Timo Furuholm.