Sern

Sern may refer to:


 * SERN (single expansion ramp nozzle), a type of rocket nozzle
 * Lou Sern, an alias for American singer Tom Hooker
 * "Sern.", the standard botanical abbreviation for botanist Rutger Sernander
 * SERN, a fictional organization in the videogame Steins;Gate
 * a fictional sector of space from Star Wars
 * a raw meat dish in Chinese cuisine