Rostyslav Babiychuk was born in Kishinev, Bessarabia Governorate, Russian Empire (today Chișinău, Moldova) in a family of railway workers.
[1] He joined the All-Union Communist Party (Bolsheviks) (Communist Party of the Soviet Union) in 1939 and headed department of propaganda and agitation at the Odessa Railways Khrystynivka department, while being an instructor at the Communist Party (Bolsheviks) of Ukraine.
During the World War II he worked at the Northern Railway in Ivanovo.
In 1951–1952 Babiychuk was the First Secretary of Zhytomyr Oblast committee of the Communist Party (Bolsheviks) of Ukraine.
In 1954–1976 he was a candidate member of the Central Committee of the Communist Party of Ukraine.