The model and former footballer rose to fame on the reality TV show in 2015, and appeared from seasons 14 to 17.
He was found dead with head injuries at a holiday villa in Majorca, according to the Sun.
An spokesperson for the Foreign, Commonwealth & Development Office told BBC News: "We are supporting the family of a British man who has died in Spain and are in contact with the local authorities."
Earlier this week, Hall posted family pictures and insights from his trip on Instagram.
He became a regular on The Only Way Is Essex after joining the cast as a friend of Vas J Morgan, and was the ex-partner of co-star Chloe Lewis.
After leaving in 2024, he focused on his fashion brands, By Jake Hall and Prévu Studio.
Hall, who used to play football for Boston United, was also an artist, and unveiled his first sculpture in Majora last month.
