Mads Juel Andersen (born 27 December 1997) is a Danish professional footballer who plays as a centre-back for EFL League One club Luton Town.
Andersen started his football career at Herstedøster at the age of five. He has stated that he only joined the club to be with his friends – having preferred to go into athletics instead.
After playing nine months in Albertslund, Andersen joined Brøndby's academy at the age of nine.
In November 2015, Andersen penned his first professional contract with Brøndby. On 12 April 2015, he was named in his first squad for the club in a match against SønderjyskE, where he remained on the bench for the whole game.
In the 2015–16 season, Andersen was only called up for one game. In the following season, he was loaned out to HB Køge in the 1st Division until January, with the deal later being extended to the end of the season. Andersen played 25 league games and scored two goals for the club before he returned to Brøndby.
Andersen got his debut for Brøndby in the Danish Cup against Ledøje-Smørum Fodbold, where he played all 90 minutes. However, he didn't make any appearances in the league for the club, before he left.
On 27 September 2017 it was announced that Andersen would join Superliga side AC Horsens from the new year. From the 2018–19 season, Andersen turned in to a very important player for the club, becoming a regular starter for the team. He played 20 league games and scored three goals in that season.
On 21 June 2019, Andersen left Horsens to move abroad, joining EFL Championship side Barnsley for a reported fee of £900,000 in a four-year contract. In his first season with the club, Andersen was a regular starter and played in almost every game. He scored his first goal for Barnsley in a 2–2 draw with Cardiff City on 27 January 2021. Andersen was appointed captain from the 2022–23 season.
On 3 July 2023, Andersen signed for newly promoted Premier League club Luton Town for an undisclosed fee. He scored Luton's first ever home Premier League goal on 1 September 2023 against West Ham United in a 2–1 defeat.
Andersen was sidelined in October 2023 with a hamstring injury, followed by a recurring calf issue that limited him to just eight appearances in his debut season with Luton. In February 2024, he consulted a specialist to address the calf problem.
In the 2024–25 season, Andersen once again was limited by injury issues. In the next season following the club's double relegation, he became a regular starter for the club in League One, making 33 appearances.
As of match played 10 September 2026
Barnsley Player of the Season: 2022–23
EFL League One Team of the Season: 2022–23
PFA Team of the Year: 2022–23 League One
Mads Juel Andersen at Soccerway
Mads Juel Andersen national team profile at the Danish Football Association (in Danish)