Eudaemon was an ancient city in Arabia, modern day Aden.

Eudaemon or Eudaimonia may also refer to:

Eudaemon (mythology), a type of daemon in Greek mythology Eudaimonia, a concept in Aristotelian ethics and political philosophy Eudaemons, a 1970s group of physicists named after the Aristotelian concept Eudaemonia (moth), a genus of moths native to sub-Saharan Africa

See also Eudaimonisma, a genus of moths native to Australia