Zuzanna Stefania Siwy (born 1972) is a Polish–American chemist at the University of California, Irvine.

Her research considers synthetic nanopores and their application in ionic devices.

She graduated with a master's degree in polymer technology in 1995, before completing a doctorate in chemical sciences in 1997.

[1] Siwy joined the faculty at the University of California, Irvine in 2005.

She studies synthetic nanopores, which she looks to use as templates for biomimetic channels as well as ionic diodes and transistors.