Sheffield United Naughton was born in
Sheffield, South Yorkshire. He was a product of
Sheffield United's centre of excellence and academy, having trained with the club the age of seven. He attended an England under-15 training camp during the
2004–05 season, and over the years has become a regular in the academy and reserve teams. He captained his club's academy team to the quarter-finals of the FA Youth Cup in the
2006–07 season. He was signed by
Scottish Premier League team
Gretna on
loan in January 2008, and made his league debut for Gretna against
Rangers on 16 January 2008. He played regularly for the rest of the season at the troubled Scottish club who were placed into administration during his tenure there. Despite this Naughton continued for Gretna as the Blades agreed to cover insurance payments needed to allow him to play. Naughton played 19 times for the club but was unable to help them avoid
relegation. Naughton made his first team debut for the Blades the following season, coming on as a second-half substitute in the first round of the League Cup against
Port Vale in August 2008. In his second substitute appearance for the club he netted the winning goal in a 2–1 League Cup success over Yorkshire rivals
Huddersfield Town. Naughton made his league debut on 20 September 2008 against
Norwich City, he then went on to make his first start for Sheffield United in their 2–1 victory over
Watford on 27 September 2008, gaining the man of the match award. From that point he cemented his place in the starting eleven and was virtually ever present for the rest of the season, becoming first choice at right back whilst also making a couple of appearances in midfield and finishing the season playing at left back to cover for the injured
Gary Naysmith. His successful season was rewarded when he was voted Young Player of the Year by the United supporters club, was runner up to
Matthew Kilgallon in the senior Player of the Year award and was included in the Championship
PFA Team of the Year.
Tottenham Hotspur in 2011 Despite major interest from
Everton, Naughton signed for
Tottenham Hotspur in July 2009 along with fellow
Sheffield United player
Kyle Walker for a combined fee of £9 million. He made his Spurs non-competitive debut against
Barcelona in the 2009
Wembley Cup which ended in a 1–1 draw. He came on as a substitute in the 94th minute in the match against
West Ham United, which was the club's third match in the 2009–10 season to mark his debut in the
Premier League. Naughton then signed a six-month loan deal with
Middlesbrough on 1 February 2010. He made his debut in the 1–1 draw against
Ipswich Town. After returning to Tottenham he was loaned out again initially until January to another
Championship club,
Leicester City. He made his debut on 16 October in a 1–1 draw against
Hull City. In his second match for Leicester City, against Leeds United, he scored the second league goal of his career. He scored again for Leicester City in the 5–1 win against Doncaster Rovers. He also scored against Barnsley in a 4–1 win on 5 February with a 30-yard drive into the top corner. Naughton also scored a 25-yard rocket to equalise for Leicester in the M69 derby against Coventry. On 12 March, Naughton scored Leicester's 3rd goal in their 3–0 win over Scunthorpe. Leicester extended Naughton's loan until the end of the 2010–11 season on 8 January after a permanent move failed to materialise. In April, Naughton was named as right back in the Championship PFA Team of the Year for the second time in three years and won the Leicester City Young Player of the Year award. On 21 July 2011, Naughton signed a season-long loan deal to
Premier League team
Norwich City from Tottenham Hotspur. He was handed squad number 25 for his year in Norfolk. Naughton was an unused substitute for the Canaries opening Premier League fixture against Wigan Athletic on 13 August 2011. Naughton displaced
Russell Martin as the first-choice right back, and started the matches against Stoke, Chelsea and West Brom. In all, he made twenty-three appearances over the course of the season at either right back or centre back. Naughton made his first full league start for Tottenham on 16 September 2012 away to Reading, a match in which Tottenham won 3–1. Naughton quickly established himself as first choice right back for Swansea, before being ruled out for the remainder of the
2014–15 Premier League season with ankle ligament damage in a 3–1 victory over
Hull City. Naughton was shown a red card in the 31st minute of his side's 4–2 defeat to
Sunderland in a decision which was criticised by interim manager
Alan Curtis. The red card was overturned upon appeal. Naughton continued to rotate in the right back position with club stalwart
Àngel Rangel over the
2015–16 season, before becoming first choice in the
2016–17 season. On 13 May 2017, Naughton scored his first goal for the club and his first in the Premier League in a crucial 2–0 victory over Sunderland, which helped to retain Swansea's Premier League status that year. On 1 September 2018, Naughton scored a long-range effort away to
Millwall to help Swansea to a late win while playing in the unusual position of central midfield. On 23 February 2019, Naughton played his 100th game for Swansea in a 3–1 defeat to
Sheffield Wednesday. In the
2019–20 season, Naughton played much of the season as a centre back under new coach
Steve Cooper as Swansea lost in the Championship play-offs to
Brentford. On 5 February 2021, Naughton made his 200th Swansea City appearance in a 2–0 win over Championship leaders
Norwich City. The season would end with defeat in the play-offs to Brentford once again. At the end of the
2022–23 season, Naughton was not named on Swansea's retained list, having seen his play time diminish, but did sign a one-year contract on 7 June 2023. Naughton made his 300th appearance for Swansea in a 2–1 victory over Sunderland on 24 February 2024. On 2 May 2025, it was announced that Naughton would depart Swansea at the end of the 2024–25 EFL Championship season. Naughton made his final appearance for Swansea from the bench, replacing fellow departee
Joe Allen in a 3–3 draw with
Oxford United. ==International career==