On 12 July 1919 Edward Reynolds established the Old Northamptonians Association in memory of the 94 members of staff, sixth formers, and leavers of Northampton Grammar School who had lost their lives in the First World War.

The football section was founded as Chenecks FC in 1946 under the guidance of well-known Coroner Sergeant of the Borough Police, George Lloyd.

In the 2009–10 season the club won its first major honor in the last twenty years under the guidance of Andy Marks when they picked up the Junior Cup with a 1 – 0 victory over local rivals Silbey at Nene Park.

As ground improvements (driven by the current Chairman Eddie Slinn) had been made during the season promotion was granted to the United Counties League Premier Division for the first time in the club's history.

2017–18, after a 2nd stable season in the United Counties Premier Division Graham Cottle decided to end his 8-year reign at the club.

His replacement for the new season has come from within the club as Eddie Slinn decided to promote reserve team manager Ben Foster into the role.