Karl von Harrach (1570 – 16 May 1628) was a nobleman, statesman, and diplomat in the Holy Roman Empire.

He then became a member of emperor Ferdinand's Geheimrat (Privy Council), he joined the "Spanish faction" of the council, centered around Hans Ulrich von Eggenberg[2][1] In January 1625, his castle Schloss Prugg [de] in Bruck an der Leitha was exempt from provincial taxation.

His body was transported to the Harrach family mausoleum located in the Augustinian Church, Vienna.

[1] [4] Harrach's passing and Eggenberg's resignation negatively influenced Wallenstein's popularity within the Imperial court, facilitating an internal purge orchestrated by the general's opponents and endorsed by the Emperor.

Wallenstein and Trčka were assassinated, along with other officers, during the purge's culmination in the so-called Eger Bloodbath.