Killerby is a hamlet in the borough of Darlington and the ceremonial county of County Durham, England. It is situated a few miles to the west of Darlington. In 2021 the parish had a population of 62.
In the Imperial Gazetteer of England and Wales (1870–72) John Marius Wilson described Killerby:
Etymology
The name Killerby is of Old Norse origin. The first element is the given-name Kilvert and the second is bȳ meaning "farm". Spellings of the place-name suggest the first element was mistaken for Old French culvert ("freeman").
Demographics
At the 2011 Census the population was less than 100.