Census of Ireland, 1911

Form A, which was completed by the head of the family, contained the following information for each person in the home on the night of 2 April:

Census of Ireland, 1911: Form A

• Name and Surname
• Relation to Head of Family
• Religious Profession (Protestants were requested to indicate denomination)
• Education (whether able to read and write)
• Age (last birthday) and Sex
• Rank, Profession, or Occupation
• Particulars as to Marriage (marital status, length of marriage, number of children born alive, number of children still living)
• Where Born
• Irish Language (whether able to speak Irish)
• Disability: if persons were:
  • Deaf and Dumb
  • Dumb only
  • Blind
  • Imbecile or Idiot (i.e. intellectually disabled)
  • Lunatic (i.e. severely mentally ill)

The form was signed by both the census enumerator and the head of the family.

Form B1, which was known as the House and Building Return, was completed by the enumerator and summarised the following administrative information for the street or townland, or part thereof:

• County
• Parliamentary Division
• Poor Law Union
• District Electoral Division
• Townland
• Parliamentary borough
• City
• Urban District
• Town or Village
• Street
• Barony
• Parish

It then summarised the following information pertaining to the houses and families of the street or townland. The information about houses included:

• Number of House or Building
• Whether Built or Building
• Whether Private Dwelling, Public Building, School, Manufactory, Hotel, Public-house, Lodging-house, Shop, etc.
• Number of Out-Offices and Farm-steadings as returned on Form B2
• Whether House Inhabited
• Walls (whether made of permanent or perishable material)
• Roof (whether made of permanent or perishable material)
• Rooms (number, whether 1, 2–4, 5–6, 7–9, 10–12, 13+)
• Windows in Front (exact number)
• Class of House (1st, 2nd, 3rd, or 4th, based on information supplied above)

The information about families included:

• Number of distinct Families in each House
• Name of the Head of each Family residing in the House
• Number of Rooms occupied by each Family
• Total Number of Persons in each Family
• Date on which Form A was collected
• Number of Persons in each Family who were sick on 2 April 1911
• Name of the Landholder (if any) on whose Holding the House is situated
• Number on Form M1 if House is on the Holding of a Landholder

Form B2, the Return of Outhouses and Farm-Steadings, gave more detailed information on secondary buildings attached to a property, such as outhouses, workshops, and various kinds of farm buildings.

Form N, the Enumerator's Abstract for a Townland or Street, recorded the enumerator's name, the same administrative information as listed for Form B1, the properties and which were inhabited, and the numbers of families, males, and females, and persons of each religious denomination.

The total population of Ireland according to the 1911 census was 4,390,219 of whom 2,192,048 were male and 2,198,171 were female.