Ernest Johann Nepomuk (20 April 1731 – 17 March 1788), Imperial Count von Herberstein, was the first bishop of the diocese of Linz from 1785 to 1788.

Nepomuk was chosen as Bishop of Linz, Austria on 1 January 1785, and confirmed in this position of 14 February 1785.

[1] Formerly titular Bishop of Eucarpia, he had been the Official of the Prince-Bishop of Passau and Vicar-General of Lower Austria.

In 1789, the endowment of the diocese was fixed at 12,000 gulden ($4,800), to which were added the revenues from the property of several suppressed monasteries.

Not only in secular matters did the bishop ask for the assistance of the provincial government at Linz, he also sought to obtain the approbation of the civil authorities for the statutes of his chapter, as well as for the episcopal and consistorial seals.