The midfielder chose a move to Ibrox over the opportunity to stay at Burnley or a potential Premier League return.
The 33-year-old chose to sign a two-year deal offered by the Glasgow side instead of staying at Burnley and despite some speculation that a number of Premier League clubs could have been interested in his services.
Barton becomes Mark Warburton's fourth signing ahead of the Gers' return to the Scottish Premiership, following fellow free transfers Matt Crooks and Josh Windass from Accrington and the £250,000 deal to bring Liverpool youngster Jordan Rossiter to the club.
The former Manchester City and Newcastle United midfielder will a bring a wealth of experience to Ibrox, with the once-capped England man boasting over 400 senior appearances to his name across a 13-year senior career.
Barton himself is clearly delighted with the next step in his career, judging by posts he shared on Instagram and Twitter on Tuesday afternoon.
After posting a photograph on Instagram of himself holding his young son dressed in Rangers attire, the midfielder tweeted to show just how much he values becoming a part of the club.
He wrote: "To be a Ranger is to sense the sacred trust of upholding all that such a name means in this shrine of football."
To be a Ranger is to sense the sacred trust of upholding all that such a name means in this shrine of football. pic.twitter.com/nb5yTKq420— Joseph Barton (@Joey7Barton) May 24, 2016
Having starred for Burnley in their promotion-winning campaign this season, winning the club's Player of the Year award and being named in the PFA Championship Team of the Year, Barton will surely stand out in the Scottish top flight next term.
He may be heading towards the twilight of his career, but if Rangers can adapt well to life back in the Premiership then the move will surely give the midfielder his best chance to secure top-flight honours for the first time.