The reality star, who appeared in the 2016 series of the ITV2 dating show, was found dead at an address in Ponteland, Northumberland on Wednesday. "A report will now be prepared for the coroner", the statement read.
During her time on the show, Sophie also dated Tom Powell, and the couple went on to have a short-lived relationship after leaving the villa.
Gradon, also the victor of Miss Great Britain in 2009, made history on the dating show in 2016 as one half of Love Island's first same-sex couple, after she "coupled up" with fellow contestant Katie Salmon, The Guardian reports.
Soon after the news broke, several past Love Island contestants paid tribute to Sophie, who took part in series 2 of the hit ITV show. "RIP" Fellow Islander Cara de la Hoyde posted: "Such a bad day my heart is broken & goes out to the very one effected".
She tweeted: "You were such an intricate, creative, intelligent soul".
Olivia Buckland, who also appeared, wrote: "Awful terrible news this morning".
Bowen, who appeared on Love Island in 2016, wrote: "We had lots of little chats and so many laughs. you were the the shoulder to cry on and a attractive person with a handsome soul".
"To your family and your loved ones".
"As an ex Miss Newcastle and Miss GB I can say that it's time people moved forward from their old fashioned thinking and accepted the simple fact that women like to have sex".
"We had lots of little chats and so many laughs. you were the the shoulder to cry on and a handsome person with a lovely soul". RIP you handsome lovely woman.
She continued: "A young woman who hasn't harmed anyone but a woman who has faced a torrent of judgemental and close minded opinions since leaving Love Island".
While another added: "Tonight's episode should be cancelled in memory of Sophie Gradon".