ADO Den Haag U21 is the youth team of the professional soccer club ADO Den Haag, based in The Hague, Netherlands. The team competes in the Dutch Eerste Divisie, the second-highest tier of youth soccer in the country.

The U21 team serves as a development platform for young talented players, providing them with the opportunity to hone their skills and progress towards the first team. The coaching staff focuses on developing technical abilities, tactical understanding, and physical fitness, with the ultimate goal of preparing players for professional soccer careers.

ADO Den Haag U21 competes against other youth teams from top clubs in the Netherlands, offering players the chance to test themselves against high-quality opposition and showcase their talents. The team plays its home matches at the club's training ground, providing a supportive environment for players to grow and improve.

With a strong emphasis on player development and a commitment to nurturing young talent, ADO Den Haag U21 is an important part of the club's overall strategy for success both on and off the field.