Gillian Furniss (born 14 March 1957) is the member of Parliament for Sheffield, Brightside and Hillsborough.
She was elected as a councillor on Sheffield City Council in 1999, representing the Southey ward. She stood for Labour in Sheffield Hallam in the 2001 general election and finished in third place.
She is the widow of Harry Harpham, MP for Sheffield Brightside and Hillsborough, who employed her as a part-time researcher after his election in the 2015 general election.
After her husband's death in February 2016, she was selected as the Labour candidate at the Sheffield Brightside and Hillsborough by-election which was held on 5 May 2016. She won the by-election with an increased share of the vote and a majority of 9,590 (42.5%) over the second-placed candidate representing UKIP.