The Cyberiad (Polish: Cyberiada), sometimes subtitled Fables for the Cybernetic Age, is a series of humorous science fiction short stories by Polish writer Stanisław Lem published during 1964–1979. The first collected set of stories was originally published in 1965, with an English translation by Michael Kandel first appearing in 1974.

The main protagonists of the stories are Trurl and Klapaucius, two "constructor" robots who travel the galaxy, constructing fantastic machines. Nearly every character is either a humanoid robot or some sort of intelligent machine, with few living creatures ever appearing. These robots have for the most part organized themselves into proto-feudal societies with strict ranks and structures. The timeline of each story is relatively constrained, with the majority of the individual tales following one or both of the two protagonists as they find and aid civilizations and people in need of their creations, advice, or intervention. Though the thematic content of the stories is broad, most focus on problems of the individual and society, as well as on the vain search for human happiness through technological means.

In 1970, the book was adapted into the opera Cyberiada. Alongside many of Lem's other works, this book has been an inspiration for numerous films and games. There is a steel statue of Elektrybałt, Trurl's legendary electronic bard, in the Copernicus Science Centre, Warsaw.

The Cyberiad shares the peculiar robot's universe, as well as the style, with the cycle Fables for Robots.

Despite its titular status, the word "Cyberiad" refers to nothing in the tales; it is used only once in an ambiguous context by Trurl's Elektrybałt.

Trurl and Klapaucius are "constructors" — brilliant engineers capable of God-like exploits through the machines they build. The two have complete control over the physical laws of the universe; for instance, on one occasion, Trurl creates an entity capable of extracting accurate information from the random motion of gas particles, which he calls a "Demon of the Second Kind", with the "Demon of the First Kind" being Maxwell's demon. In another instance, the two constructors re-arrange stars near their home planet in order to advertise their services. Despite this incredible power, without their machines the two are relatively powerless, and are captured, incapacitated, and physically beaten numerous times.

The duo are both best friends and intellectual rivals. Their adventures consist of both building revolutionary machines at home and travelling the galaxy to aid those in need. Although they are firmly established as fundamentally good and righteous people through their actions, they typically demand payment for their services, usually delivered in the form of precious metals. In one story, when rewards for slaying a dragon are promised and not delivered, Trurl disguises himself in the skin of the dragon to continue harassing the local inhabitants until he can collect his payment. Despite their love of money, they prefer to aid the oppressed and help civilizations reach higher "levels of development" (at least by their own standards.) The machines the two build and the journeys they embark on are the basis for the greater moral lessons of the book.

Though humans are virtually nonexistent, most intelligent machines are still highly anthropomorphic in nearly every aspect; they are bipedal, divided into two sexes, experience human emotions, and at least appear to be capable of love. Robotic versions of physical and mental disabilities, old age and death, particularly in case of accidents or murder, are also common, though mechanical language is used to describe them. Death is theoretically avoidable through constant repair (and sometimes even reversible), but most machines still carry with them a deep-seated knowledge of their own mortality.