Former Sheffield United midfielder has extended his stay at the Liberty Stadium until 2015 after an impressive season in the Premier League with Brendan Rodgers' side
The ex-Sheffield United player has featured heavily this season to help Brendan Rodgers' men follow up their Championship play-off final success of last year with an impressive first campaign in England's top league.
Britton, whose contract was set to expire in 2013, is pleased with his second spell at the Liberty Stadium and hopes to end his career at the club.
"I'm pleased to complete the deal," he told the club's official website. "It was an easy decision for me to make, although I still find it strange when I look back to the day I left for Sheffield United.
"I didn't even think I would be back in Swansea colours, let alone playing for the club in the Premier League armed with a new three-year contract.
"That will take me up to my 32nd birthday, but I'd like to think that if I can keep myself fit and healthy, live my life right, then I can go on until my mid to late thirties.
"In an ideal world I'd like to stay at Swansea until the day I retire - or they retire me! - because I love it here and the club has a bright future ahead of it.
"Our debut season in the Premier League has gone well so far and everyone wants to build on that. If we all stick together then, like I said, the future is bright."