The 26-year old full-back has signed a three-and-a-half-year deal with the Swans, for an undisclosed fee, after spending the past five-and-a-half years at White Hart Lane which was dotted with loan spells.
Naughton, who joined Spurs from Sheffield United in 2009, spent time with Middlesbrough, Leicester City and Norwich City during his contract in north London but will now continue his career in south Wales.
The former England U21 international, who played 74 times for Spurs, admitted he was relieved to finalize his move to the Liberty Stadium and is now targeting regular game time under Garry Monk.
"I'm pleased it's all done because there has been talk since the summer over a potential move," Naughton told the club's official website.
"My main aim is to start playing regular football again. I know it's going to be a tough challenge because there are some very good players here, but that's my goal.
"I've had quite a few loan moves over my career, but I actually played 34 games last season for Spurs, which is a fair amount.
"The main problem for me, however, was that I was still in and out of the team. That's difficult at times.
"I'm sad to be leaving Spurs because it's a great club. I was there quite a while and the lads are a great bunch.
"But now I just want to settle into life at Swansea and try to play regularly.
"It all comes down to playing football - after all, that's my job."
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