Joachim Andreas von Schlick, Count of Passaun and Weißkirchen (in Czech Jáchym Ondřej Šlik z Holíče, hrabě z Passaunu; 9 September 1569, in Ostrov – 21 June 1621, in Prague) was a Bohemian nobleman of the Schlick family in the Kingdom of Bohemia and the Holy Roman Empire.
Then from the "Winter King" Frederick V, Elector Palatine, to whose election he had contributed, he received the Office of High Court judge.
Before his execution, he managed to write a letter to the Saxon agent in Prague, Bartholomew Brunner, his old friend, who had promised to deliver it to the Provincial Commissioner, Prince Charles of Lichtenstein.
The letter of 17 January 1621 is intended as a supplication to Lichtenstein, who was a relative of Schlick's wife, asking him to intercede with the Emperor in hopes that a public apology would save him.
He was executed 21 June 1621 at the Old Town Square in Prague, along with 26 other nobles, knights and civic leaders who had supported the Protestant regime.
Executioner Jan Mydlář hung Schlick's head with his hand laid on his mouth at the Old Town Bridge Tower.