Bob the Builder is a British animated children's television series created by Keith Chapman for HIT Entertainment, and ran from 12 April 1999 (1999-04-12) to 31 December 2011 (2011-12-31) in the United Kingdom through the CBBC strand and later CBeebies. The series centres on the adventures and escapades of a general contractor named Bob who owns a team of anthropomorphised construction vehicles that go about their day helping out the residents of Bobsville; Sunflower Valley and Fixham Harbour are featured in later seasons. They are also joined by work colleague Wendy, alongside their neighbours and friends.

The series used stop-motion animation for the original series as well as Project: Build It, provided by Hot Animation in Manchester. The series changed to CGI animation in 2010 for its final two seasons; titled Ready, Steady, Build!, of which SD Entertainment handled animation production.

Following the series' conclusion, HIT Entertainment was purchased by US toy company Mattel for $680 million. In October 2014, the company announced a new series that would feature changes in the setting, casting and character designs. The revival aired on Channel 5's Milkshake! for three series from 2015–2018, and was severely criticised by fans of the original version. An animated theatrical movie adaptation of the series was announced in January 2024; which will be produced by Jennifer Lopez’s Nuyorican Productions and star Anthony Ramos as the voice of Bob.