Jo Cox was born on 22 June 1974 in Batley, West Yorshire, England, UK. She was married to Brendan Cox. She died on 16 June 2016 in Birstall, West Yorkshire, England, UK.
Cox was married to Brendan Cox, who was an adviser on international development to Gordon Brown during the latter's premiership. They had two children, who were aged three and five when Cox died.