Born in Ratnapura in the year 1929 and then having completed his education at Thurstan College, Jinadasa Niyathapala ventured in to journalism by having started as a freelance journalist and then becoming the founder and Editor-in-Chief of the Siyarata (Sinhala: සියරට), Dinapatha (Sinhala: දිනපතා), Dasadesa (Sinhala: දසදෙස), Yukthiya (Sinhala: යුක්තිය), Siyapatha (Sinhala: සියපත) (Daily), Parwe (Tamil: பார்வே), Ceylon Guardian (English), Thiraya (Sinhala: තිරය), Tharuwa (Sinhala: තරුව) and Cinema (Sinhala: සිනෙමා) newspaper publications.
Early political career
Jinasada Niyathapala started his political career in 1946 through the United National Party's Youth movement. In 1949 he held the position of Secretary General in the United National Party's youth movement. He was an active member of the All Island Youth Movement and from 1949 held the position of Deputy Chairman with Sir John Kotelawala holding the position of Founding Leader.
Jinadasa Niyathapala was the founding co-secretary of the Mawbima Surakeeme Viyaparaya (Motherland Protection Front) and one of the founding members and former president of the Hela Urumaya.