Robert Jan D'Eith KC is a Canadian politician, who was elected to the Legislative Assembly of British Columbia in the 2017 provincial election, defeating two-term Liberal Party incumbent Marc Dalton. He represents the electoral district of Maple Ridge-Mission as a member of the British Columbia New Democratic Party caucus. D'Eith is also a pianist, author and part-time music lawyer.

The 2017 British Columbia general election was held on May 9, 2017, to elect 87 members (MLAs) to the Legislative Assembly to serve in the 41st Parliament of the Canadian province of British Columbia. In the 40th Parliament prior to this general election, the British Columbia Liberal Party formed the government under the leadership of Christy Clark, while the British Columbia New Democratic Party (NDP), under the leadership of Adrian Dix and then John Horgan, formed the Official Opposition; the Green Party of British Columbia were also represented in the legislature with sole MLA and later leader Andrew Weaver.