Pertti Rantala was born 13 April 1941 in Northern Karelian village of Korpivaara in the Liperi municipality. His parents Aleksi and Anna Rantala were Karelian refugees from the Impilahti municipality on the northern coast of Lake Ladoga. He completed his primary and secondary education in Heinävesi and then afterwards studied at and graduated from the Niittylahti high school.