The iBook was a line of laptop computers sold by Apple Computer from 1999 to 2006. The line targeted the consumer and education markets, with lower specifications and prices than the PowerBook, Apple's higher-end line of laptop computers.

Three distinct designs of the iBook were introduced during its lifetime. The first, known as the "Clamshell", was influenced by the design of Apple's popular iMac line at the time. It was a significant departure from previous portable computer designs due to its shape, bright colors, incorporation of a handle into the casing, lack of a hinged cover over the external ports, and built-in wireless networking. Two years later, the second generation abandoned the original form factor in favor of a more conventional rectangular design. In October 2003, a third iteration was released that added a PowerPC G4 chip and a slot-loading drive.

Apple replaced the iBook line with the MacBook in May 2006 during Apple’s transition to Intel processors.