Osmo Ensio Kaipainen (12 August 1933, Pieksämäki – 15 May 1985) was a Finnish physician and politician.
He was Minister of Social Affairs and Heath from 23 February to 3 September 1972.
He served as a Member of the Parliament of Finland from 1970 to 1975, representing the Social Democratic Party of Finland (SDP).
Kaipainen belonged to the left wing of the party.
This article about a Social Democratic Party of Finland politician is a stub.