The 1901 and 1911 census returns offer a clear snapshot of Derriaghy at the turn of the century, its families, occupations, and the shape of everyday life. These records let us see who lived in each townland, how households were formed, and how the parish was changing as it moved into the modern era.
The 1901 Census of Ireland was taken on March 31st 1901, recording every person who was alive and slept in each household or institution on that night. It recorded information on the house itself, number of outbuildings and recorded Name, age, sex, relationship to the head of the household, marital status, religion, occupation, birth county/country, Irish/English language ability, and literacy.
The 1911 Census of Ireland was taken on April 2nd 1911, and is the last census to cover the whole island of Ireland.