The 30-year-old has become a firm fans' favourite since making his debut while on loan from West Ham back in 2002 and, aside from a short spell at Sheffield United, has spent the last decade in south Wales, racking up over 400 appearances.
His composure in possession has marked him out as a key figure in the club's Premier League success, and he follows Michu, Wayne Routledge, Ashley Williams, Ben Davies and Michel Vorm in agreeing a new deal.
Britton told the club website: "I'm delighted. I know I've said it before, but I would love nothing more than to finish my career here."
Like Michu, Britton's new contract is a year extension on his existing deal, and will keep him with Swansea until at least the summer of 2016.
Britton had previously penned a deal through to 2015 in March of last year.
And the diminutive midfielder admits he could never have imagined the Swans would become a Premier League club and be looking forward to a first major cup final when he arrived at their old Vetch Field home just over a decade ago.
He said: "The club has been my life for the last 10 years, apart from a six-month sabbatical at Sheffield United, of course, and there's no other place I'd rather be playing my football."