Kim Eric Drexler (born 25 April 1955) is an American author and engineer, currently Senior Research Fellow at the Future of Humanity Institute.

Drexler is most famous for his pioneering work on atomically precise manufacturing, especially as presented in his books Engines of Creation (Drexler 1986), a popular introduction to the core ideas, and Nanosystems (1992), a comprehensive graduate-level survey of the field (itself based on his MIT doctoral thesis (Drexler 1991)). More recently, Drexler's research has focused on AI risk, where he has developed an approach he calls Comprehensive AI Services (Drexler 2019). Drexler has also made original contributions to the Fermi paradox (Sandberg, Drexler & Ord 2018), space colonization (Drexler 1979), distributed computing (Miller & Drexler 1988), hypertext publishing (Drexler 1986: ch. 14), and other fields.