Esko Olavi Seppänen (born on 15 February 1946 in Oulu) is a Finnish politician representing Left Alliance. He is a former Member of the European Parliament (1996–2009) and Finnish parliament (1987–1996).
In the European parliament Seppänen was Member of the Bureau of the European United Left - Nordic Green Left and sat on the European Parliament's Committee on Budgets. He also was a substitute for the Committee on Budgetary Control and the Committee on Industry, Research and Energy.
Before founding of the Left Alliance in 1990 Seppänen represented the Finnish People's Democratic League and he was a member of the Communist Party of Finland.
Seppänen has a Bachelor's degree in business studies (1971). He worked as journalist at Yleisradio in 1970–1987.