The club was first founded on 8 April 1906 but it was disbanded again in 1915 due to problems with where they were allowed to play. On 30 March 1921, 30 young people from the football department of Lyngby IF decided to break away and start their own club. They named it
Lyngby Boldklub af 1921. For the first few years, they played at
Lundtofte Flyveplads, using the flight hangars as locker rooms. In 1949 the club moved to the area where the present-day
Lyngby Stadion is located. Lyngby was the first club in Denmark to wear the club's name on the kits, which happened in 1961. In 1983 the club became Danish champions for the first time and in 1984 the club played in the
European Cup losing to
Sparta Prague with 1–2,0–0 in the second round after beating
KS Elbasani in the first round with 3–0,3–0. In 1986 the club was the first one to win its group in the
UEFA Intertoto Cup without loss of points. The club won its second Danish championship in 1992 on
Gentofte Stadion. In 1996 the club was eliminated from the
UEFA Cup by
Club Brügge, even though playing a 1–1 draw in Belgium. 1996 was also the year when Lyngby's chairmen,
Flemming Østergaard and
Michael Kjær sold team captain
Larsen to
FC Copenhagen. The sale sparked harsh protests among the fans. In 1997
Østergaard and
Kjær left Lyngby to become chairmen in
FC Copenhagen. They were joined by striker
Jónsson. In December 2001 the club went bankrupt and was forced to finish the season using only amateur players. Hardly surprising, the team finished the season in last place and was subsequently relegated an additional two leagues due to the bankruptcy. As a result, the team went straight from playing in the Superliga to playing in the
amateur league
Danmarksserien, just below the three Danish pro leagues. In 2003 the team was promoted to the
2nd Division (the third best league), as winner of Danmarksserien, and on 18 June 2005 the team gained promotion to the
1st Division by finishing 3rd in the 2nd Division. In the
2006–07 season the team won the
Danish 1st Division thus returning to the top flight only five and a half seasons after going bankrupt. Another highlight of the 2006–07 season occurred on 12 April 2007 as Lyngby advanced to the semi-finals of the
Danish Cup for the first time in several years, by winning 1–0 against
AC Horsens on
Lyngby Stadion. In 2014, the squad was taken over by
Hellerup Finans and its chairman, Torben Jensen, became also chairman of the squad. Lyngby achieved a third place in the
2016-17 season, just a season after being promoted from the
1. Division. In the second half of the
2017-18 season, however, the club experienced financial difficulties, due to irregularities at the club owner,
Hellerup Finans, which later went bankrupt. This led to the departure of several key players, before, on 9 February 2018, the club was bought and saved by a group of local business people and fans known collectively as Friends of Lyngby. This was not enough for Lyngby to hold its place in the Superliga, as the club lost
two play-off matches against 1. Division number 3,
Vendsyssel FF, being relegated to 1. Division. Just over a year later, on 2 June 2019, fortunes were reversed, as Lyngby, finishing 3rd in
2018-19 season in the 1st Division, won 3–2 on aggregate against Vendsyssel FF, securing its re-promotion to the top flight alongside
Horsens. In the
2020-21 Superliga season, Lyngby ended in 11th place ahead of only Horsens, and was relegated back to 1st Division for the
2021-22 season. Lyngby was back in the Superliga for the
2022-23 season after winning promotion from the 1st Division, finishing the season ahead of Horsens and
AaB, thereby surviving relegation despite suffering the season's longest winless streak of 16 games. (30 May 2019) The
2023-24 season was an eventful one. In January 2024, the team experienced a managerial change when
Freyr Alexandersson was signed by
K.V. Kortrijk creating a vacancy. It was filled by
Magne Hoseth who was fired after only 50 days and two games, opening the vacancy anew to be filled by
David Nielsen. On 28 May 2024, it was announced that
Philadelphia based
Union Sports and Entertainment had entered into a strategic partnership with Lyngby Boldklub, also acquiring a minority stake in the club. The team ended the season in 8th place out of 12 teams and survived relegation. Lyngby struggled in the
2024-25 season resulting in relegation back to the 1st Division ahead of the
2025-26 season. Lyngby is currently leading the 1st division as of April 16, 2026 with 45 points in 24 games. ==Honours==