Adam Kazanowski (c. 1599 – 25 December 1649) was a noble of the Polish–Lithuanian Commonwealth from 1633; Greater Crown Stolnik from 1634; Court Chamberlain (podkomorzy koronny) and castellan of Sandomierz from 1637; Court Marshall from 1643; żupnik of Wieliczka from 1642; starosta of Barcicki, Borysowski, Kozienicki, Rumieński, Solecki[disambiguation needed], Nowotarski, Warecki, and Bielski; and a close and influential friend of King Władysław IV Vasa.

Together with his brother, Stanisław Kazanowski (starost of Krosno, Jaworów and Przedbor), Adam was raised with crown prince Władysław.

When Władysław's royal treasury ran dry once, Adam Kazanowski loaned him his money and mortgaged many of his goods, saying My liege, I cannot become poor when I am near to you, but I will not be rich without you.

Privy to the king's thoughts and secrets, and organiser of many lavish parties and festivities, he was marginally interested in the 'great (foreign) politics', but he was a powerful player in the smaller court intrigues.

After that, Kazanowski became an enemy of the queen and other Habsburg supporters, like Jerzy Ossoliński, and allied himself with Piotr Gembicki (chancellor until 1642).