The Futurological Congress is a novel by Stanislaw Lem detailing the exploits of the hero of a number of his books, Ijon Tichy, when he visits the Eighth World Futurological Congress at the Costa Rica Hilton.

Various adventures and misfortunes befall the hero, most of which are the result of the government bombing the hotel with LTN bombs (Love Thy Neighbour). The hallucinogenic effects of the bombs result in a number of situations where the characters and reader question what reality actually is.