Rushden & Diamonds Football Club was an association football club based in Irthlingborough, Northamptonshire, England. Nicknamed "The Diamonds", the club played at Nene Park. The club's main rivals were county neighbours Kettering Town.

Irthlingborough is a town on the River Nene in North Northamptonshire, England. As of 2021, it has a population of 9,325, and was at one point the smallest town in England to have had a Football League team, Rushden & Diamonds F.C., before the promotion of Forest Green Rovers in 2017. The parish church, St Peter, has a lantern tower, unusual for Northamptonshire churches, which was built to guide travellers across the Nene valley in foggy weather. It also has doors at the four cardinal points and has eight misericords in the chancel.