The dummy-half had been on holiday with a group of NRL players including Gold Coast star AJ Brimson and Brisbane's Jordan Riki and Jesse Arthars.
Concerns were first raised for the 24-year-old when Arthars and others posted to social media that he had not been seen for 24 hours after last being spotted at the Sala Apollo nightclub.
Barcelona police confirmed to 7NEWS on Thursday morning AEDT, that a body believed to be that of Hampson was found on a nightclub floor, believed to have been after a fall from a substantial height.
Hampson had played four years in the Queensland Cup, moving from Tweed Head Seagulls to Redcliffe at the end of 2021.
He came off the bench in last month's Queensland Cup grand final loss to Norths Devils, and was in a position to impress Wayne Bennett and the NRL's 17th franchise at the Dolphins.
