W1A is a British mockumentary sitcom television series that satirises the management of the BBC. It was created by John Morton, and first broadcast on BBC Two on 19 March 2014. The series is the follow-up to Twenty Twelve, a BAFTA-winning comedy series by the BBC about the 2012 Summer Olympics in London. It sees the reintroduction of Hugh Bonneville and Jessica Hynes as their Twenty Twelve characters, alongside a new cast, with David Tennant's role as narrator also continuing from the earlier series.

The first series began on 19 March 2014, concluding on 9 April. A second series was announced later in 2014 which launched on 23 April 2015 with a one-hour special. In August 2016, Radio Times announced that W1A had been recommissioned for a third and final series, which began airing on 18 September 2017.The series is named after the postal code of the BBC's headquarters, Broadcasting House, which is W1A 1AA.