集成电路（英语：integrated circuit，缩写：IC）、或称微电路（microcircuit）、微芯片（microchip）、芯片（chip）在电子学中是一种把电路（主要包括半导体设备，也包括被动组件等）小型化的方式，并时常制造在半导体晶圆表面上。

前述将电路制造在半导体芯片表面上的集成电路又称薄膜（thin-film）集成电路。另有一种厚膜（thick-film）并合集成电路（hybrid integrated circuit）是由独立半导体设备和被动组件，集成到基板或线路板所构成的小型化电路。

An integrated circuit or monolithic integrated circuit (also referred to as an IC, a chip, or a microchip) is a set of electronic circuits on one small plate ("chip") of semiconductor material, normally silicon. This can be made much smaller than a discrete circuit made from independent electronic components. ICs can be made very compact, having up to several billion transistors and other electronic components in an area the size of a human fingernail. The width of each conducting line in a circuit can be made smaller as the technology advances; in 2008 it dropped below 100 nanometers, and was reduced to 14 nanometers in 2014.