Youth System competed up to age group of 21 until the end of 2018–19, when Turkish Football Federation announced the termination of U21 Ligi.

[18] In 1943, Süleyman Seba (1926–2014) was recruited for Beşiktaş Genç Takımı, while playing at high school level football at Kabataş Erkek Lisesi.

[24] This success qualified Beşiktaş Amatör to participate at 1985–86 Turkish Cup, in which they were eliminated by PTT at Round 1 by a 1–0 final score.

On 6 March 1988, beating Denizli Belediyespor with 2–0 final score, Beşiktaş Amatör won 1988 Turkish Amateur Football Championship.

[28] Held at Fenerbahçe Stadium on 1 February 1989, following a 5–1 win in front of 923 recorded spectators, Beşiktaş J.K. seniors eliminated Beşikaş Amatör with 9–1 aggregate score.

[32] In the second half of the 2008–09 season, Beşiktaş J.K. U-21 alumnus Sergen Yalçın managed the team on a 6-month spell, with an undefeated tally.

[35] On 2 December 2016, during a U-21 derby encounter held at Fenerbahçe Lefter Küçükandonyadis Facilities, hosting side Fenerbahçe U-21 ran out of their three substitution quota and they had to play down to 10-man due to the injury of Alparslan Demir picked up in second half, Beşiktaş U-21 coach Yasin Sülün substititued Sedat Şahintürk out on 74th minute and did not replace him with another player, letting the teams playing remaining 16 minutes 10 to 10 players.

[10][11] In July 2020, club announced that their cooperation with former German international olayer Fabian Ernst, who also played at Beşiktaş between 2009 and 2012, to establish youth academies across continental Europe,[41] focusing Germany, Austria and, the Netherlands.