Hermann IX of Baden-Eberstein

Hermann IX of Baden-Eberstein (died 13 April 1353) was the son of Margrave Frederick II of Baden-Eberstein and Agnes of Weinsberg. On his father's death in 1333 he succeeded to the Eberstein share of the margraviate.

In 1344 he gave the Iburg to his uncle Rudolf IV of Baden-Pforzheim, but in 1350 King Charles IV enfeoffed him with it again. In 1341 he married Matilda of Vaihingen; their son Frederick IV died before him, so when Hermann died in 1353 his cousin Rudolf VI inherited Eberstein.