Wigger I (died 981) was the father of a line of counts ruling from his new castle of Bilstein, west of Albungen (today part of Eschwege) to the Werra. The counts of Bilstein played a prominent role in Thuringia from 967 to 1301 and were third after the Ekkehardinger and Weimar-Orlamünde in terms of power and influence.