Knebworth Football Club, which was originally formed in 1901, incorporated Knebworth Youth FC, formed in 1977, in the Summer of 2013. Knebworth Old Boys FC was incorporated into the combined club in Summer 2014.
Knebworth Football Club was formed in 1901 as founder members of the North Herts League and were crowned champions on five occasions and won the county Junior Cup in 1912/13, before moving to the Herts County League in 1948.
A period of success came in the 1970s with a host of championships and cup wins, often under the influence of ex-Tottenham Hotspur player Johnny Brooks. Knebworth Football Club moved up the football ladder in 1983 to the South Midlands League, as well as to a new ground at Old Knebworth Lane. After five years the club returned to the North Herts League due to financial difficulties, winning three cups and a league title in two seasons, before going back to the Herts County League.
There is no evidence to suggest that the club ever had a youth section, and in 1977 Doug Dilley set up Knebworth Youth Football Club initially with just an U12 boys team. The club began to grow and quickly had teams at U9 and U10 for the following season. The club continued to grow and within 25 years there were boys and girls teams representing the club from Under 6 through to Under 17 and over 200 registered players.
Knebworth Football Club folded in 1995 when their ground at Old Knebworth Lane was sold as a health club. Four years later, Martyn Bond took his Knebworth Youth Football Club U18 side into senior football and re-formed Knebworth Football Club. After four successful years in the Hertford & District League the club were elected to the Herts Senior County League, achieving the FA's 'Charter Standard' award that same year and being crowned Herts FA 'Adult Club of the Year' in 2005.
Knebworth Youth Football Club first achieved the FA's 'Charter Standard' award in 2004 and went on to pick up the Herts FA 'Club of the Year' in this category in both 2006 and also 2008. Further hard work and continued development saw the club achieve the coveted FA 'Development Club' status.
In summer 2013, Knebworth Youth Football Club was incorporated into Knebworth Football Club.
Knebworth Old Boys Football Club formed in the late 1980s as a veterans team playing on Sunday mornings, and in May 2014 agreed to join the club to bring all Knebworth football under one banner.