Halina Buyno-Łoza (12 December 1907, Łódź – 13 September 1991, Wrocław), also known separately with each last name, was a Polish theatre actress and dancer.
After the war, she was recruited by the communist Polish government's Security Service to act as an informant for "anti-state crimes", especially among her colleagues at the Municipal Theatre.
After a few years, she became worried about what would happen to her friends in the theatre industry if she continued, so she outed herself to others of her actions.
In response, from 1952 to 1953, the Polish authorities sentenced her to 1.5 years in prison, but she was released after nine months as amnesty after the death of Joseph Stalin.
It was reported later by other inmates of the prison that Buyno-Łoza had been physically abused by the Soviet guards in charge.