During the 19th century it is recorded that Kilby became an independent parish, having been previously in union with Newton Harcourt and Fleckney. It is thought that they had formed the ancient parish sometime in the 13th century. Another boundary change occurred within Kilby during the First World War. This happened due to Lord Cottesloe of Wigston selling 50 acres of smallholdings to Leicestershire County Council, which were in turn given to ex-servicemen from Kilby who had fought in the First World War.
