Microworld is the world as it exists at a microscopic scale. Besides, it may also refer to:

• Microworld (video game), a 1981 text adventure game

MicroWorlds, a computer program using the Logo programming language

• MicroWorlds JR

• Microworlds: Writings on Science Fiction and Fantasy, a 1984 book by Stanisław Lem

• Nature's Microworlds, a 2012 British nature documentary series

• Applied Technology, a company also known as Microworld