John I, Count of Ziegenhain

John I (died 1359) was count of Ziegenhain from 1304. In 1311 he married Lukardis, heiress of Count Engelbert I of Nidda, and in 1333, after her line ended, he merged Nidda with Ziegenhain, reuniting the counties divided in 1258.

Caught between Hesse and the archbishopric of Mainz, he steered a careful balancing course; in 1323 the future Emperor Louis IV enfeoffed him with the castle and town of Nidda as an imperial fief. He secured his lands by building or extending castles, and under him the county reached its greatest prosperity.