Jakob Maria Mierscheid (born March 1, 1933) has been a German politician in the German Bundestag since 1983. He was second leader of the middle man Committee of the Bundestag in 1981 and 1982.
In 1983 he published in the Vorwärts magazine the still valid Mierscheid Law, special research results for elections and relations to the German industrial production.
He was born in Morbach/Hunsrück, a very rural constituency. He is Catholic and member of the SPD.