Jade has a Grandfather named Mohammid Badwi but it is unknown where he was born. He got married to Amelia Aziz born during 1928 in South Shields, Tyne & Wear and had a child called Norma. Norma Badwi is Jade's mom who was also born in Souths Shields, Tyne & Wear, in 1958. She is a business manager at Laygate Primary School in South Shields where Jade attended.
James Thirlwall was born during 1961 and is also from South Shields. He (like Norma) is a Business Manager at a community school. However he divorced Norma leaving her single. Karl David Thirlwall is Jade's older brother, born during 1989. He and his wife, Shireen Dunlop, have three children. Leone ,their first child, born during 2004. Karl, their only son, born during April 2012, and Amara Jade Elizabeth Thirlwall, named after Jade herself, born during 2016.
- Jade dated dancer Sam Craske from 2012 till 2014. Sam is a member of Diversity, a dance troupe, that won Britan's Got Talent in 2009. They broke up in the end of June 2014 because of their busy schedules. Jade's bandmate Jesy Nelson broke up with her boyfriend Jordan Banjo, a bandmate of Sam, around the same time.
- There were also rumours of her being romatically linked with Collabro member Michael Auger.
- She is currently dating Jed Elliott who is bassist for the band The Struts. They got to know each other through Jesy's ex-fiancé Jake Roche, whose band Rixton is friends with Jed. After being friends for some time Jade and Jed started dating in early 2016.