Frenkie de Jong (ফ্রেংকি ডে ইয়ং) is a Dutch professional footballer who plays as a midfielder for La Liga club Barcelona and the Netherlands national team.

De Jong began his professional career at Willem II in 2015. He transferred to Ajax for a symbolic fee of €1 a year later. The fee was symbolic and offset by a sell-on clause. At Ajax he established himself as one of the best young midfielders in Europe, after winning a domestic double and reaching the Champions League semi-finals. De Jong won the Eredivisie and KNVB Cup, was Eredivisie player of the season, and was an instrumental part of Ajax's first UEFA Champions League semi-final appearance in 22 years, in a breakthrough 2018–19 season.

During his breakthrough season, De Jong agreed to sign for Barcelona in January 2019, leading him to be signed for the club in July, for a fee worth €75 million. De Jong was selected to the 2019 FIFA FIFPro World11 and was one of three Dutch players to feature in it for the first time in five years.

Frenkie de Jong was born in Gorinchem and grew up in Arkel, a town in the province of South Holland. His parents, Marjon Schuchhard-de Bruijn, who works in home care, and John de Jong, a community service officer working with parking restrictions, named him after the British pop band Frankie Goes to Hollywood. He has a younger brother, Youri de Jong. Frenkie de Jong started playing football at six years old when his father enrolled him at the local amateur club ASV Arkel. At eight, De Jong was scouted by the professional club Willem II, where he progressed through the shared youth academy of Willem II and RKC Waalwijk.

De Jong made eight appearances for the Netherlands under-19 team, with his debut coming against Russia on 7 July 2015. He made six appearances and scored one goal for the Netherlands at under-21 level.

Frenkie has described himself as a player "who likes to have the ball a lot, and play possession". A versatile player, De Jong can function as a regista, defensive-midfielder, central-midfielder, holding midfielder, box-to-box midfielder and centre-back. He has been lauded for his combination of defensive stability and playmaking ability. He often partnered Matthijs de Ligt at centre-back, at Ajax. As a centre-back, he abstained from committing fouls, showed great positional sense, and won possession frequently. In this more defensive role, his performances led to comparison with former German sweeper Franz Beckenbauer and likened his tendency to progress forward in possession, and ability to play-make, from defense to the German legend.

De Jong's vision has been praised alongside his ability to dribble in narrow spaces, control over possession, and decisive passing. A natural dribbler, De Jong has the highest dribbling success of all players to participate in all competitions, during his last season with Ajax. An extraordinary game-reader, he often makes offensive runs through the middle.

Since he started playing professionally, De Jong has chosen 21 on his shirt as a tribute to his grandfather who was born on 21 April.

De Jong met his wife Mikky Kiemeney in high school and they have been together since 2014. The couple became engaged in July 2022, and married in May 2024. The couple has two sons, Miles de Jong, born on 21 November 2023, and Mason de Jong, born on 21 August 2025.