John Henry Stump (June 4, 1880 – May 15, 1949) was an American cigar maker, labor advocate, and Socialist politician who served as Mayor of Reading, Pennsylvania.

He ended his education at the age of thirteen, as his father was in ill health and he needed to provide for the family.

In 1927, Stump was elected mayor, with James H. Maurer and another socialist serving alongside him as city councilmen.

[4] Stump left the Socialist Party of America following the Old Guard faction's split and helped form the Social Democratic Federation in 1936.

At the SDF's founding convention in 1937, Stump spoke critically of his former party, stating: We came here because we could no longer square our Socialist conscience with remaining in the party which has fallen into the hands of disruptors, of people who do not believe in the idea and ideals of democratic Socialism.